2 



HOW TO PHOTOGRAPH 



many beautiful insect preparations cannot 

 I) e photographed successfully ; a n d w e 

 would, therefore, advise the beginner to 

 study the preparation of microscopic ob- 

 jects, so as to be able, in case of need, to 

 prepare and mount his own objects. As an 

 example, a fly's tongue forms a pretty mi- 

 croscopic object, and most of the slides met 

 with are tolerably good ; yet a photograph 

 taken from these ordinary slides usually is a 



complete failure. The reason is, that the 

 unequal transparancy of tlie object makes 

 some parts over exposed, while in the 

 darker parts, detail has not impressed the 

 film. Here the best way is to make, or 

 have made, a special preparation. 



LESSO.N I. — MICROSCOPICAL APPARATUS. 



Any good microscope stand may be em- 

 ployed for photo-micrography. It must be 



really good ; an inferior instrument is use- 

 less. It must be firmly and solidly built, 

 and the line and coarse adjustments should 

 be of the best construction. One of the 

 cheai> microscopes, with a fine adjustment 

 that gradually moves the object from the 

 field ( f view on being turned, will be found 

 a source of continual annoyance, and should 

 be avoided. If the student have, by igno- 

 rance or ill advice, one of these things, let 

 him part with it at any price, and procure 

 one of the low-priced, Vnit firmly built, well- 

 adjusted stands made by Beck, Collins, 



Ross, or Swift. These will be found to 

 give ample satisfaction. 



The stand figured above, made by Mr 

 Collins, of Portland Street, (London,) is 

 well suited to photo- micrographic work. 

 It is well made, lakes the full size eye- 

 pieces, is furnished with a good one inch and 

 quarter inch, and costs, with case, only ^5 

 \os. A begiimer could not have a better 

 instrument. The writer uses a stand by 

 Swift, which has a coarse adjustment so good 

 that a iVth or iVth inch may he focussed 

 with ease and precision with it alone. Tiie 



