166 THE MICROSCOrE. [August, 



matic objective and of a compensating ocular were also dis- 

 played ill proper series, all the lenses entering into the combina- 

 tion being shown botli in the rough and the finished state. 

 Probably every visitor would have voted with the jury in awarding 

 the one special prize, the diploma of pre-eminence, to the Jena 

 company. 



Next to this, three grand prizes were given, which went to 

 London. Paris, and Germany, respectively. The English one 

 was bid for by a solitary stand, with two or three objectives and 

 condensers at its feet, that looked so lonesome, not to say insig- 

 nificant, that to claim a leading prize for it seemed almost pre- 

 sumptuous. Its appearance, amidst the neighboring cases 

 crowded with showy apparatus, suggested at once the quiet home 

 from which it caine in Euston Road, in contrast with the shovv\' 

 shops where such goods are commonly displayed. But tlie stand 

 made a strong competition for its not too modest claim, to be the 

 most perfect that is made, the apochromatic objectives were judged 

 to merit their high reputation, and the apochromatic condensers 

 vv^ere found to give a singularly perfect illumination, and a '-'•grand 

 frix " was awarded to Powell & Lealand. 



Prizes of like grade were well earned by, and awarded to, A. 

 Nachet of Paris, and to E. Hartnack, originally also of Paris, but 

 since the Franco-German war. now of Pottsdam, Germany, both 

 of whom exhibited a large variety of apparatus of the very highest 

 grade, including excellent apochromatic objectives and sumptu- 

 ous photomicrographic apparatus. 



Of the many creditable exhibits of a somewhat more modest 

 grade, at least in respect of prices, by far the largest was that of 

 Wm. Watson & vSons, of London. In facr, it was one of the most 

 interesting and commendable features of the exposition. It stood 

 alone, except for the single P. & L. stand, as the sole represen- 

 tative of the English ideas and styles, while everything around it 

 was continental, wholly continental. These makers, also, in de- 

 veloping some of their most practical stands, have made such 

 large and good use of American ideas and experience that we are 

 half inclined to claim a special interest in the result. We have 

 been much interested in their efforts during recent years to de- 

 velop and improve the simple and less expensive forms of mi- 

 croscopes, especially in rendering the English and American type 

 convenient and available for laboratory use, and in building up in 

 London well-organized shops (after a method characteristic of 

 American practice) where work of a uniformly good quality can 

 be done by machinery at a moderate cost. Perhaps the mostuni- 

 versallv available of their more ambitious instruments, thou":h for- 

 tunately far from the largest or more costly, is the one lately ar- 

 ranged from Dr. Van Heurck's suggestions and named after him. 

 Though of moderate size and cost, being of exactly the size that 



