138 The Microscope. 



Microscopists he was personally known to a large circle of the 

 most advanced workers in microscopical research, and by his exten- 

 sive coiTespondence was brought into relations of close fi-iendship 

 with many who seldom appeared at the annual meetings. He was 

 one of the original members of the Cleveland Microscopical Society, 

 which contained no more active, earnest or valued member. He 

 was seldom absent from its meetings,' and his contributions to its 

 proceedings, in addresses and debates, were always anticipated with 

 interest, and listened to with admiration, owing to the complete 

 mastery of his subject which he invariably displayed, for he spoke 

 upon no subject which he did not thoroughly understand in all its 

 aspects, and followed the same rule in his writings for the press, as 

 the readers of his articles can uniformly attest. 



As the possessor of a marvelous technical and manipulative skill 

 in microscopical work Dr. Moore had not only a national but an almost 

 world-wide fame from the rarity and perfection of his preparations 

 and the elegance of appearance he imparted to them, his elec- 

 trical slides, minute Geisler tiibes, silver-plated and gold-plated 

 diatoms, stained diatoms, stained ciystals, etc., being especially well- 

 known both in Europe and America. He was the first to success- 

 fully double stain nucleated blood corpscules, his formula for which 

 was published in The Microscope (vol. ii., p. 73), and was adopted 

 by Cole of London, for the slides of blood sent out by him in hi& 

 series of typical preparations. 



It was, however, in relation to the optics of the microscope 

 and its accessories that Dr. Moore's labors and acquirements were 

 most valued by those who knew him and his works. In this line he 

 had no superiors. He understood perfectly the qualities and the 

 construction of lenses, prisms and reflectors, and was able to 

 foi-mulate the curves and dimensions and the refi'active index of all 

 the lenses of any objective or given combination of lenses. If an 

 objective of certain power and qualities were required he could 

 furnish the complete and correct formulae for its manufacture. His 

 latest work in this line was the production of the formula for a 

 concave lens of excessive minuteness to be applied with a fluid of 

 peculiar composition to the front of ordinary high power objectives, 

 by which means he increased the aperture of the objective im- 

 mensely. 



Dr. Moore was born at San Diego, Cal., July 12th, 1860, and 

 was, therefore, less than twenty-seven years of age at his death. 

 That a career of such brilliant promise should at so early a period 



