[Illustration: No. 141.]
141. This =Hand Microtome=, shown in the figure above,
screws to the edge of the table. The specimen is held in
a clamp which may be removed from the instrument, and
which is raised by a micrometer screw to which a large
disc is attached, the edge of which is milled and
graduated, each degree of the graduation representing an
elevation of the specimen of 1/100 mm. The knife is
manipulated by hand and in cutting slides over two
narrow glass plates which serve as a track for it. The
length of this track is 7 cm =12.--=
142. =Cylinder Microtome.= The specimen is held by means
of a clamp-screw in a hollow cylinder. This entire
cylinder is raised within another cylinder which bears
the cutting table by means of a screw with milled and
graduated head. Each division of the graduation
represents a motion of the inner cylinder of 1/100 mm.
In cutting the edge of the knife is made to pass over
the surface of the glass cutting table, the diameter of
which is 7 cm =6.--=
[Illustration: Cylinder Microtome.]
143. =Microscopic section-cutter=--razor form--of best
quality, plano-concave, for microtomes No. 141 and 142 =1.25=
=Miscellaneous Accessories.=
[Illustration:Analizer. Polarizer.
Polarizing Apparatus No. 144.]
144. =Polarizing Apparatus= for Food Analysis.
The analizer forms part of an ocular which fits into the
tube of the microscope and is provided with a graduated
disc and index. It is fixed in any desired position by
means of a thumb-screw.
The polarizer, when used in connection with stands
fitted with a substage condenser and iris-diaphragm, is
hung in the carrier of the iris diaphragm; when used on
other stands it takes the place of the cylinder
diaphragm, and if desired may be furnished with a
condenser. Price =22.--=
145. =Simpler Polarizing Apparatus.= The analizer is
without an ocular and has no graduated disc. The
polarizer is as described above =14.--=
146. =Gypsum= and =Mica plates= set of 8 =6.--=
147. =Coverglass Tester=, for measuring the thickness of
coverglasses =3.75=
147a. =Coverglass gauge=, dial form, for the rapid and
accurate measuring of coverglasses, thin plates etc. A
slight pressure on a lever opens a pair of steel clips.
The exact thickness is at once indicated by a pointer
moving over a divided circle on the lid of a metal box.
The gauge measures 0,01 up to 5 mm =12.--=
148. =Nose-piece= for two objectives--Double nose-piece =6.--=
149. =Nose-piece= for three objectives--Triple nose-piece =8.--=
150. =Nose-piece= for four objectives--Quadruple nose-piece =10.--=
Nose-pieces can be adjusted to our stands at any time
without charge.
151. =Iris-diaphragm= =6.--=
[Illustration: Illuminating Lens No. 152.]
152. =Illuminating Lens on stand=, 100 mm diameter =12.--=
153. =Illuminating Lens on stand=, 60 mm diameter =8.--=
154. =Glass slides=, hollow, per doz =--.75=
155. =Glass slides=, English form 3×1", of plate-glass
with polished edges, per gross =1.--=
156. =Glass slides=, with well, for moist chambers =--.40=
157. =Cover-glasses=, squares, 15×15 mm, per 100 =--.60=
158. =Cover-glasses=, squares, 20×20 mm, per 100 =--.85=
159. =Cover-glasses=, circles, 15 mm diameter, per 100 =--.85=
160. =Cover-glasses=, circles, 20 mm diameter, per 100 =1.--=
[Illustration: Turn-table No. 161.]
161. =Turn-table=, for ringing, with adjustable slide clips =4.--=
162. =Thickened Cedar Oil= for oil-immersion lenses, 1 oz =--.40=
163. =Object Marker.= This is designed to indicate the
exact portion of an object which has been seen in the
field of the microscope. After finding the required
field, the objective of the microscope is unscrewed and
the marker is screwed into the tube in its place. By
then moving the tube so that the marker comes in contact
with the object that portion of the object which
occupied the optical axis of the microscope is indicated =1.25=
164. =Object Marker= with diamond point, by means of
which the object can be marked by drawing a circle =4.--=
165. =Demonstration Ocular= of Kuznitzky (Cf. Zeitschr. f.
wissensch. Mikroskopie, XIII, 1896).--Indicates any
particular portion of the image to which it is desired
to draw particular attention.
A small lever at the top of the ocular moves an
indicator just above the diaphragm of the ocular to any
part of the field =3.25=
[Illustration]
166. =Opaque Illuminator=, for illuminating polished
pieces of metal whose structure is to be investigated by
means of high power objectives--A collar, carrying a
prism, screws into the tube of the microscope, and by
means of the prism sufficient light is thrown through
the objective upon the otherwise opaque object to permit
of its examination up to 1000 diameters magnification =6.--=
167. =Erecting Prism=--This is fastened over the ocular
and erects the image received from the compound
microscope, thereby materially assisting any dissection
or other operation on the stage of the microscope =7.25=
[Illustration]
168. =Microscope= for the accurate reading of
thermometer scales, after Fridtjof Nansen.
Stand with spring-clamp to attach thermometers of
various sizes. With micrometer ocular and objective
magnifying 12 times =20.--=
[Illustration: Saccharimeter No. 169.]
169. =Saccharimeter=, Mitscherlich's (improved form),
for determining the amount of sugar contained in
liquids, glucose etc. by measuring the angle of
rotation. Tube with concave mirror on stand, graduated
scale with vernier and lens for reading one-tenth of a
degree of rotation.
The rotation of the Nicol prism with the vernier is
performed by means of an endless screw. The adjustment
is accomplished as soon as the two squares of the
divided quartz-plate show the same color. Two tubes of
100 and 200 mm length, for the liquid to be examined,
are supplied with the apparatus. Should the rotation of
the substance examined be excessive, it is necessary to
use sodium light for illumination =52.--=
=Microscopical cases.=
170. =Case=, containing a razor, spatula, two small
knives, straight and curved scissors, forceps, two
needles, two lancet-shaped needles =5.50=
171. =Case=, containing a razor, spatula, a small knife,
two needles, small scissors, and forceps =4.--=
172. =Case=, containing a small knife, small scissors,
forceps and two needles =2.50=
173. =Botanical Outfit= in case, containing a small
knife, forceps, self-closing forceps with horn handle,
two scissors, two needles and two lenses =5.50=
174. =Outfit for Sputum Examinations=, after Kaatzer,
consisting of a platinum needle, blower, cover-glass
forceps, and a small rubber plate =4.75=
175. =Leather Microscope case= to protect the mahogany
case when travelling =8.--=
176. =Leather case= to protect the mahogany cases of
larger size instruments =12.--=
177. =Bell jar= for covering microscope =2.--=
Any of the following publications will be sent on application:
1. Catalogue of microscopes etc., which has been issued in three
editions, viz. in
a) English,
b) German and
c) French.
2. Anleitung zum Gebrauch des Microscops.
3. Instructions pour l'emploi des microscopes.
4. Directions for using the Microscope.
5. On the method of counting red and white corpuscles with Thoma's
Apparatus.
6. Instructions pour l'emploi de l'hématimètre de Thoma.
7. Anleitung zur Mikrophotographie, mit vier Mikrophotogrammen.
8. Anleitung zum Gebrauch des Mikrospectroskops.
9. Anleitung zum Gebrauch des Oculars nach Ehrlich.
10. Description de l'oculaire d'Ehrlich.
11. Direction for using Ehrlich's eye-piece.
12. Anleitung zum Gebrauch des grossen Projectionsapparates.
13. Anleitung zum Gebrauch des Saccharimeters.
[Illustration]
=Index.=
Page
=A.=
Achromatic Objectives 12
Adjusting screw 49
Adjustment, coarse, fine 17, 18
Apertures 10
Aplanatic Lenses 67
Apochromatic Lenses 14
Apparatus for Blood Examinations 70
=B.=
Binocular Preparation Microscope 68
Binocular Microscope after Greenough 69
Bell jar 103
=C.=
Camera 81, 84
Cases for Stands 19
Cedar Oil 101
Clamps for Microtomes 94
fixed clamp 94
ball and socket clamp 94
Naples clamp 94
Compensation Eye-pieces 14
Compressors 49
Condenser 20
Corneal microscope 69
Counting chambers 71
Coverglass gauge 99
Cover-glasses 100
Cover-glasses thickness 8
Coverglass Tester 99
Cylinder Iris Diaphragm 20, 23
Cylinder Microtome 98
=D.=
Demonstration Lens-holder 67
Demonstration Microscope 49
Demonstration Ocular 101
Dissecting Microscopes 62
Dissecting Microscope with erected image 64
Dissecting Stage 66
Dölken's Microscope Stand 52
Drawing Apparatus after Abbe 74
Drawing Apparatus after Tubeuf 77
Drawing Board 76
Drawing Eye-pieces 74
=E.=
Edinger's Projection Apparatus 84
Engel's Alcalinity Apparatus 72
English screw 18
Erecting prism 102
Eye-pieces:
Compensation Eye-piece 14
Demonstration Ocular 101
Huyghenian Eye-piece 11
Micrometer Eye-piece 73
Ehrlich's Eye-piece 72
Eye-piece with cross lines 59
Eye-piece Micrometer with squares 73
=F.=
Freezing Apparatus 97
Focussing lens 67
=G.=
Glass compressor 49
Glass-Micrometer for the Eye-piece 73
Glass plates, ground, clear 82
Glass slides 100
Glass slides, hollow 100
Gypsum and Mica plates 99
Greenough Binocular Microscope 69
=H.=
Haemacytometer after Thoma 71
Handle for holding lens 67
Hand Microtomes 97
Hand Spectroscope 71
Horizontal Microscope 56
=I.=
Illuminating Apparatus 20
Illuminating Lens 100
Immersion Objective 12, 13
Immersion Oil 101
Iris-diaphragm 100
Iris cylinder diaphragm 20
=K.=
Knife-carrier 93
Knife-holder 97
Knife after Thoma 96
Knives for Microtomes 96
=L.=
Lamp 83
Leather case 103
Lenses:
aplanatic 67
binocular 68
for the pocket 68
Lens for Algae Examination 65
Lens-holders 65
Lens for Projection 90
=M.=
Magnification 13
Mechanical Stages 78
Megascope 91
Micrometers 73
Micrometer Eye-piece 73
Micrometer with squares 73
Micrometer-screw 18
Microscope after Dölken 52
" " Nebelthau 50
" " Unna 33
" stereoscopic 69
" mineralogical 57
" for dissections 62
" for reading thermometer scales 102
" for the examination of trichinae 48
Microscopical Cases 103
Micro-Spectroscope 70
Microtomes 92
Microtome knives 96
Moist chamber 100
=N.=
Nansen's Microscope 102
Nebelthau's Microscope 50
Net micrometers 73
Nose-pieces 100
Notice 4
=O.=
Object Marker 101
Objectives achromatic 12
" apochromatic 14
" photographic 85
Ocular for Demonstrations 101
Oil-Immersion 12, 14
Opaque illuminator 102
Outfit for Sputum Examinations 103
=P.=
Photographic Objectives 85
Photographic plates 82, 85
Photomicrography 82
Photo-micrographic Apparatus 82
Photomicrographic Apparatus with joint for inclination 83
Pfeiffer dissecting microscope 64
Pipettes 70
Plate holders 82, 85
Pocket Microscope 65
Pocket Lens 68
Polarizing Apparatus 99
Preface 6
Projection 87
Projection Apparatus, large size 91
Projection Apparatus after Edinger 84
Projection-lamp 90
Projection-lens 90
Projection-ocular 91
Publications 104
=R.=
Reflector 83
Revolving Eye-piece 15
Rheostat 90
=S.=
Saccharimeter, Mitcherlich 102
Screw-micrometer eye-piece 73
Simple dissecting microscope, wood case, with handrests 66
Sliding Microscope (Nebelthau's) 50
Sliding Microtome 92, 95
Slide for counting the corpuscles of the blood 71
Spectroscope 70
Stage-Micrometer 73
Stage for Dissections 66
Stand for supporting specimens 83
Stand A 24
Stand I 28
Stereoscopic Binocular stand 69
Stand Ia 30
" Ia with English Foot 32
" Ib 34
" II 36
" IIa 38
" IIb 40
" III 42
" IV 44
" V 46
" VI 48
" I for Mineralogical Research 57
" II " " " 60
Stereoscopic Microscope 69
Swing-out Condenser 20
=T.=
Thoma's Haemacytometer 71
Thoma Knives 96
Travelling Microscopes 53
Trichinoscope 91
Tube length 8
Tubeuf drawing Apparatus 77
Turn-table 101
Türck counting chamber 72
=U.=
Unna's Microscope 33
=W.=
Warm Stages 80
Water-Immersion 12
Welsbach lamp 83
Printed by Fr. Richter, Leipzic.
=Transcriber's Notes:=
hyphenation, spelling and grammar have been preserved as in the original
minor punctuation changes made without notes
Page 5, and specimens. focal length. ==> and specimens.
Page 10, will suffice tho show ==> will suffice to show
Page 15, eye-pieces may he changed ==> eye-pieces may be changed
Page 17, movement on Stands AI, Ia ==> movement on Stands A, I, Ia
Page 22, the purpore of modifying ==> the purpose of modifying
Page 25, in tis central portion ==> in its central portion
Page 26, has the folloving advantages ==> has the following advantages
Page 26, is absolutly no limit ==> is absolutely no limit
Page 43, an excellent loboratory stand ==> an excellent laboratory stand
Page 47, Exe-pieces I, III. ==> Eye-pieces I, III.
Page 54, size like the I. b. ==> size like the Ib.
Page 59, stand with these accessoires ==> stand with these accessories
Page 61, the and of the tube ==> the end of the tube
Page 62, The fit inside ==> They fit inside
Page 64, The case consists ==> The base consists
Page 68, Aplantic triplets 64-68 ==> Aplanatic triplets 64-68
Page 69, Magnifikation, 20 diam. ==> Magnification, 20 diam.
Page 71, micrometric measurment ==> micrometric measurement
Page 78, Mechanical stage Nr. 98 ==> Mechanical stage No. 98
Page 85, 42 und 64 mm ==> 42 and 64 mm
Page 90, removed duplicate 'Transport 250.--'
Page 91, also wheter it is direct ==> also whether it is direct
Page 91, a continual, flow ==> a continual flow
Page 97, 136. Lenght of cutting edge ==> 136. Length of cutting edge
Page 98, with melled and graduated ==> with milled and graduated
Page 99, forms port of an ocular ==> forms part of an ocular
Page 99, any disired position ==> any desired position
Page 99, The gange measures 0,01 ==> The gauge measures 0,01
Page 103, light. for illumination ==> light for illumination
Page 103, 167. Bell jar ==> 177. Bell jar
Page 107, Stage-Mikrometer, 73 ==> Stage-Micrometer, 73
End of Project Gutenberg's Microscopes and Accessory Apparatus, by Ernst Leitz