Conversations on
章节目录
共 24 段- _Emily._ In playing at base-ball I am obliged to use all my
- _Emily._ No, no; the body would have no weight, whatever wer
- _Emily._ And may we not say that gravity is the force which
- _Caroline._ What an idea! Were we not indebted to sir Isaac
- _Mrs. B._ Let us, in imagination take off the upper part of
- _Mrs. B._ That is very true; a lever of this kind is therefo
- 47. (Pg. 66) In what proportion does it gain power? (fig. 7.
- 7. (Pg. 72) What is the law respecting the time required for
- _Caroline._ I think I must now be convinced. But you will, I
- _Mrs. B._ The motion of a pendulum is opposed by the resista
- 17. (Pg. 93) What is meant by the term zone; and are the fri
- _Mrs. B._ The moon is a month in going round the earth; twic
- _Mrs. B._ On account of the upward pressure of the particles
- _Mrs. B._ Springs which do not constantly flow, are called i
- _Emily._ Water cannot, then, be raised by a pump, above 32 f
- _Mrs. B._ The direction of the wind makes less difference in
- _Mrs. B._ No; that is a different case, from the sheet of wa
- _Mrs. B._ There are, evidently, two representations of the t
- Now that you understand the principle of refraction, I will
- _Mrs. B._ They cannot appear green, because they have no gre
- _Emily._ I comprehend the nature of these two opposite defec
- ECLIPSE. The interruption of the light of the sun, or of som
- TROPICS. Two circles on the globe on either hemisphere, at t
- "SIR--I have read with pleasure and profit your History of