1884.] 



MICROSCOPICAL JOURNAL. 



67 



sale of optical goods. Mr. Walmsley 

 is personally known to a large num- 

 ber of microscopists in all parts of the 

 country — perhaps no dealer in micro- 

 scopes has svich an extended personal 

 acquaintance with microscopists as 

 Mr. Walmsley. It will be seen that 

 the business of this firm embraces not 

 only microscopes, but also other op- 

 tical, and physical instruments, and 

 photographic supplies. 



Messrs. H. R. Spencer & Co. con- 

 tinue the manufacture of their justly 

 celebrated objectives, which we have 

 reason to believe are in constantly 



increasing: demand. The American 



... 

 public is sure to appreciate articles 



of real excellence, for which a good 

 price must be demanded. The Spen- 

 cer objectives are not cheap, but they 

 are good. 



Mr. Zentmayer is probably the 

 oldest established manufacturer of 

 microscopes in the country. We 

 need not say more than that, for per- 

 manent success in any business is only 

 to be obtained by, earnest effort, and 

 Mr. Zentmayer has made a reputation 

 that will endure. 



Mr. Emmerich, the agent for C. 

 Zeiss, has introduced many of the 

 fine instruments of that famous manu- 

 facturer, into this country, where they 

 are as well appreciated as at home, — 

 especially the almost optically perfect 

 object-glasses inade strictly according 

 to the calculations to Dr. E. Abbe. 



In glancing over this list the reader 

 will obsei-ve that there are few names 

 known to microscopists not here rep- 

 resented. It is true that the micro- 

 scope trade is not now^ as profitable 

 as it has been in the past, owning to 

 lower prices and too great competi- 

 tion. For this reason a few names that 

 have appeared from time to time on 

 these pages are no\v absent. We trust 

 and believe that the times are grow- 

 ing better, and that those names "will 

 again be seen. Whatever temporary 

 disturbances may arise, trade is never 

 very long out of its normal condition. 

 Discounts promiscously offered have 

 been at the root of the matter, and 



such irregulai'ities must correct them- 

 selves. The existence of a journal 

 like this is sure to prove beneficial to 

 every dealer and manufacturer. Sub- 

 scribers should consider this and send 

 their orders only to those dealers who 

 recognize the fact, and express their 

 recognition of it by occupying space 

 upon our advertising pages, more or 

 less according to their means and ex- 

 tent of business. There are not many 

 we are pleased to observe, who are 

 willing to reap the benefits of the 

 existence of a microscopical journal, 

 without giving it their constant en- 

 couragement and support. 



NOTES. 



— A writer in Science Gossip in describ- 

 ing the eyes of spiders, the article forming 

 one in the finely illustrated and interesting 

 scenes entitled "Graphic Microscopy" 

 which is now running in that journal, 

 suggests an ingenious method of examin- 

 ing the eyes of living spiders. It is to 

 make a paper cone with the apex cut off 

 slightly smaller than the body of the spider. 

 A vigorous spider will soon project its 

 head through the aperture. When in 

 this position it should be blocked behind 

 with moist cotton, and the base of the cone 

 then gummed to a slide. 



— The Scientific American gives an 

 account of an "Electric Microscope" 

 exhibited at the Crystal Palace, which is 

 an apparatus for projection with the micro- 

 scope, using the electric light for illumina- 

 tion. We fail to discover any novelty about 

 the apparatus, for the electric light has 

 been used for the purpose before, — never, 

 however, with very satisfactory results, 

 owing to the unsteadiness of the light. If 

 the electric light could be made steady 

 enough for the purpose, such exhibitions 

 would become very popular no doubt — but 

 changes in the optical appliances must be 

 introduced before satisfactory results can 

 be obtained in any way. There is no 

 doubt great improvements can be made in 

 this respect, and we hope soon to be able 

 to make some experiments in this direc- 

 tion, of which our readers shall be duly 

 informed. 



— Messrs. J. W. Queen & Co. have call- 

 ed our attention to a statement on page 

 227 of the preceding volume, which they 



