GENERAL NOTES 143 



around its margin on the film side with 

 some light-excluding pigment, to the width of 

 about a quarter of an inch. Then paste on the 

 glass side a piece of "post paper" with an 

 opening slightly larger than the object, which 

 will render the negative opaque excepting the 

 object itself, and the print can be made with a 

 white and clear field. Figures 9, 24, and 27 

 are from negatives treated in this manner. 



In bringing these notes to a conclusion, 

 which is also the finis of this little book, I 

 would say, in apology for their being perhaps 

 somewhat drawn out, that in the writing I 

 have kept . its title constantly in view, and 

 earnestly endeavored to ground my readers 

 who may have known nothing of photo-micro- 

 graphy, in the A B C of the science, or art, 

 before proceeding with more advanced les- 

 sons. Those who have already learned its 

 alphabet, or crossed its " asses-bridge," and 

 to whom these details will appear trivial or 

 unnecessary, may pass them by, perhaps pick- 

 ing out a grain of wheat here and there 

 among the chaff. To one and all, however, 

 I extend my earnest wishes for their success 

 in this fascinating and important work, urging 

 upon each the homely old advice " If at first 

 you don't succeed, try, try again." 



