290 THE AMERICAN MONTHLY TSept 



MICROSCOPICAL NOTES. 



Algae. — Mrs. H. M. Jernegan of Edgartown, Massa- 

 chusetts, furnishes mounted and pressed sea mosses for 

 scientific collections. 



Objectives. — Dr. Pierce Tyrrell who has examined 

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

 Bullock and others corrects his article on page 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, Longsight, Manchester, has new 

 catalouges of his well-known microscopical and lantern 

 slides. The catalogue of microscopical slides includes 

 both botanical and zoological susjects, and we would call 

 attention to a series of 48 slides, especially arranged to 

 meet the requirements of pharmaceutical students, and 

 sold at the very moderate price of a guinea. 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 catalogue of lantern 

 slides represents very fully zoology, botany, geology, phy- 

 sical o-eography, and such special subjects as insect meta- 

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

 plete. The slides, both lantern and microscopical,aresold 

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

 ferior to those at double the price elsewhere. 



