. Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . THE TWO MIRRORS. By W. J. WISH to help someof the younger mi-croscopical readersof Science-Gossipto make a more in-telligent, and there-fore more success-ful, use of the mir-rors,for the purposesof illumination. Illumination is toevery microscopista suhject of specialinterest. Its im-portance is so greatas to be quicklyrecognized, even bythe young difficulties areas quickly it is, perhaps,seldom studied with sufficient care and thoroughness,owing, it may
. Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . THE TWO MIRRORS. By W. J. WISH to help someof the younger mi-croscopical readersof Science-Gossipto make a more in-telligent, and there-fore more success-ful, use of the mir-rors,for the purposesof illumination. Illumination is toevery microscopista suhject of specialinterest. Its im-portance is so greatas to be quicklyrecognized, even bythe young difficulties areas quickly it is, perhaps,seldom studied with sufficient care and thoroughness,owing, it may be, to a fear that the investigationwould prove both difficult and tedious ; that it would,in fact, require more time, and a larger amount ofmathematical knowledge, than the young microscopisthas at command. But if the principles which underlie the art ofillumination be not understood, it naturally followsthat the art itself will remain unmastered, and thatthe practical details will be the occasion of more orless perplexity. Difficulties will be unexpectedly metwith, which the observer, failing to account for,cannot with any certainty ove
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
