of Geometrical Problems, many of which are new, and to be found in no
other Work. 2. The Description and Use of those Mathematical Instruments
that are usually put into a Case of Drawing Instruments. Besides these,
there are also described several New and Useful Instruments for
Geometrical Purposes. 3. A complete and concise System of SURVEYING,
with an Account of some very essential Improvements in that useful Art.
To which is added, a Description of the most improved THEODOLITES,
PLANE TABLES, and other Instruments used in Surveying; and most accurate
Methods of adjusting them. 4. The Methods of LEVELLING, for the Purpose
of conveying Water from one Place to another; with a Description of the
most improved Spirit Level. 5. A Course of PRACTICAL MILITARY GEOMETRY,
as taught at Woolwich. 6. A short Essay on Perspective. The _Second
Edition_, corrected, and enlarged with the Descriptions of several
Instruments not contained in the former Edition, by W. JONES,
Mathematical Instrument Maker; illustrated by thirty-five Copper-plates,
in 2 vols. 8vo. Price 14s. in Boards.
VI. AN APPENDIX to the GEOMETRICAL AND GRAPHICAL ESSAYS, containing the
following Table by Mr. JOHN GALE, viz. a Table of the Northings,
Southings, Eastings, and Westings to every Degree and fifteenth Minute
of the Quadrant, Radius from 1 to 100, with all the intermediate
Numbers, computed to three Places of Decimals. Price 2s.
_Just Published_
ESSAYS ON THE MICROSCOPE,
BY THE LATE AUTHOR,
In Quarto, with thirty-four folio Plates, separate. The Second Edition,
with many Corrections, Additions, and Improvements, by
FREDERICK KANMACHER,
_Fellow of the Linnean Society_.
Price 1_l._ 8_s._ in Boards.
_Also in the Press_,
And speedily will be published,
LECTURES
ON NATURAL AND EXPERIMENTAL
PHILOSOPHY,
In Five Volumes 8vo. The Second Edition, with upwards of Forty large
Plates, considerable Alterations and Improvements; containing more
complete Explanations of the Instruments, Machines, &c. and the
Description of many others not inserted in the former Edition.
BY W. JONES,
MATHEMATICAL AND PHILOSOPHICAL INSTRUMENT MAKER.
Transcriber’s Notes
Depending on the hard- and software used to read this text and their
settins, not all elements may displayed as intended.
Archaic, unusual and inconsistent spelling, grammar and sentence
constructions have been retained; accents etc. for French and German
have not been corrected unless listed below.
Paragraph numbering has been retained, also when this was not serving
any obvious purpose and/or was not contiguous.
The use of italicised and non-italicised reference letters in the text
has not been standardised.
The hierarchy in (sub-)section headings has been based on the text,
due to the absence of a detailed table of contents and lack of visible
differences between the various levels of (sub-)section headings in
the source document.
The plates were originally bound separate from the text, but in the
source document used they were bound together with the text. Due to
the way of binding parts of most plates are invisible and discoloured
near and in the gutter. Captions and credits in and around the plates
have been reconstructed as far as possible.
Larger versions of the plates may not be available in all file
formats, but may be accessed through the browser version available at
www.gutenberg.org. In the descriptions of individual items hyperlinks
have only been provided to the Plates, not to individual figures in
the plates.
Page xv-xvii and Index: the (alphabetical) order of entries has not
been corrected.
Errata for page 49: ‘last line’ refers to footnote 28.
Page 32, Fig. 2. and description: as printed in the source document,
even though the description does not fully fit the illustration (and
vice versa).
Page 74, the end, Fig. 9 and 10: 9 and 10 are reference numbers within
Figure 4 rather than figure numbers.
Page 78-79, Eight magnifying lenses ... the list annexed to these
Essays: there are no Figures 5 through 12 in Plate III. Several of the
items described may be seen in other Plates, but with different
reference and figure numbers.
Page 83-84, The two large lenses at F, Fig. 3: there are no large
lenses at F, Fig.3 in Plate IX or in Plate III (or in any other
Plate).
Page 84, Massachuset’s States: as printed in the source document.
Page 162, ... for the feeding the growth ...: as printed in the source
document.
Page 182, ... one of these, i i, b c, Fig. 3. Plate XIII, ... and Page
183, ... the middle part i i ...: there are no reference letters i in
the illustration.
Page 205, They first fold back the parts A B: the reference letters
are not present in the drawing.
Page 352, Skin of the lump sucker: Plate XVIII. Fig. 7 falls in the
gutter of the plate, and has no caption.
Page 446, E. eliptica: eliptica and elliptica were both used.
Page 623, the blea, the bark, and the wood: as printed in the source
document.
Page 636, The roundish mouth ... a thorny margin: as printed in the
source document.
Page 691, Cold-arbour lane: possibly Coldharbour Lane or Cool Arbour
Lane.
Page 695, The English collection contains ...: the numbers given do
not add up to the total.
Page 701, knapeseed: probably an error for knapeweed or knapweed.
Page 703, Diptera, entries Oestrus: Footnote 88 continues for three
pages (294-296) in the source document.
Plate XXX, Publishd: as printed in the source document.
Changes made
Footnotes have been moved to under the text to which they belong.
Where necessary, page numbers in references to footnotes have been
adjusted accordingly.
The book uses long dashes as ditto marks; several of these have been
replaced with the dittoed text. Where necessary, the word Ibid. in
references has been replaced with the actual title.
Minor obvious typographical and punctuation errors have been corrected
silently.
The Errata have already been corrected in the text.
Fractions have been standardised m⁄n.
Page xxiv: N. B. moved from bottom of page xxiii to bottom of list.
Page xxvii: deau douce _changed to_ d’eau douce.
Page 41: f A and G a _changed to_ f A and g A.
Page 50: pour les mois _changed to_ pour le mois.
Page 52: that it would _changed to_ than it would.
Page 77: The stage, Fig. f g h i _changed to_ The stage, Fig. 1,
f g h i; the screw at _a_ _changed to_ the screw at a.
Page 81: Plate III. B, is the stage _changed to_ Fig. 3 B, is the
stage.
Page 85: that at C, Fig. 4 _changed to_ that at C, Fig. 3.
Page 172: their divine original _changed to_ their divine origin.
Page 216: the sphinx atropos squeaks _changed to_ The sphinx atropos
squeaks.
Page 361: friends, says the author, who are ... _changed to_ friends,”
says the author, “who are ....
Page 387: motion of the fluids are _changed to_ motion of the fluids
is.
Page 446: E. eliptica _changed to_ E. elliptica.
Page 476: accuminatus _changed to_ acuminatus.
Page 525: 340. _changed to_ 240.
Page 560: Plate XXII. Fig. 66 _changed to_ Plate XXVII. Fig. 66.
Page 703: page 187, note 623 _changed to_ page 187 note, 623.
Page 704: muscle _changed to_ mussel (Cancer pisum).
Index: the spelling of some entries has been standardised with that
used in the body text.
End of Project Gutenberg's Essays on the Microscope, by George Adams