290 THE AMERICAN MONTHLY [Sept 



MICROSCOPICAL NOTES. 



Algse, — Mrs. H. M. Jerneg-an of Edg-artown, Massa- 

 chusetts, furnishes mounted and pressed sea mosses for 

 scientific collections. 



Oblectives. — Dr. Pierce Tyrrell who has examined 

 hundreds of dollars worth of objectives for the late W. H. 

 Bullock and others corrects his article on pag-e 239, fourth 

 line, from "tubes and casts" to "renal tube casts." He 

 says that his Abbe condenser is anything- but achromatic. 



Microscopical Preparations. — Mr. Abraham Flatters, 

 of 16-18, Church Road, Longsig-ht, Manchester, has new 

 cataloug-es of his well-known microscopical and lantern 

 slides. The catalog-ue of microscopical slides includes 

 both botanical and zoolog-ical susjects, and we would call 

 attention to a series of 48 slides, especially arrangfed to 

 meet the requirements of pharmaceutical students, and 

 sold at the very moderate price of a g-uinea. We have had 

 an opportunity of examining- these, and found them uni- 

 formly good, while some are really excellent, such as slides 

 showing- karyokinetic division in developing- tissue, a sec- 

 tion of the root of Phajus grandifolius, showing- cell con- 

 tents, sections of the male cone of Pinus silvestris, and of 

 the fertile spike of Selaginella martensii. Many of the sec- 

 tions are double stained, and one of potato is worthy of 

 notice as being- stained with Mr. Flatters' "Gossypimine" 

 stain, which differentiates starch granules most beauti- 

 fully, and appears to be practically permanent. The stain 

 itself can be obtained from Mr. Flatters direct, as well as 

 other mounting- stains, cements, and requisites, among-st 

 which we may mention a new elastic black cement for fin- 

 ishing- slides with one ring-. The catalog-ue of lantern 

 slides represents very fully zoolog-y, botany, g-eolog-y, phy- 

 sical g-eog-raphy, and such special subjects as insect meta- 

 morphoses, evolution, mimicry, etc. It is unusually com- 

 plete. The slides, both lantern and microscopical, are sold 

 at the modest price of 6s. per dozen, and are in no way in- 

 ferior to those at double the price elsewhere. 



