Biologia gener, - Microsc. ; Conserv. 464 



61561 King, Helen Dean. 577.8 



1912. Studies on sex-determination in Amphibians. V. The effects of 

 changing the water content of the egg, at or before the time of fertili- 

 zation, on the sex ratio of Bufo lentiginosus. Jonrn. exper, Zodl. Yol. 

 12 p. 319—336. [Sex appears not to depend exclusively on spermato- 

 zoon but to be determined by egg or by egg and sperm.] 

 (i2 Morgan, T. H. 577.8 



1912. Is the change in the sex-ratio of the frog that is affected by ex- 

 ternal agents, due to partial fertilization? Amer. Natural. Vol.46 p. 108 

 —109. 



63 Morgan, T. H. 577.8 



1912. The elimination of the sex chromosomes from the male-produc- 

 ing eggs of Phylloxerans. Jouru. exper. Zool. Vol. 12 p. 479—498, 

 4 figg. 



64 Schoner, Olto. 577.8 



1912. Die praktische Vorausbestiramung des Geschlechts beim Menschen. 

 Zentralbl. Gynakol. Jahrg. 36 p. 234—235. [Geschlecht praformiert ; 

 Alternation der Ovarien.] 



65 Shull, A. Franklin. 577.8 



1912. Studies in the life cycle of Hydatina senta. III. Internal factors 

 influencing the proportion of male-producers. Joaru. exper. Zool. Vol. 

 12 p. 283—317, 6 figg. [Decrease (also in size of family) after long con- 

 tinued parthenogenesis in some lines. Individuals from fertilized eggs 

 are all female-producers. Sex determined one generation in advance.] 

 61566 Smith, Geoffrey. 577.8 



1912. Some recent Work on Sex. Rep. 81st Meet. Brit. Ass. Ady. Sc. 

 p. 414—415. [Excessive production of yolk or fatty matter in blood in- 

 duces female sex. Withdrawal of fat from Inachus by Sacculina gives 

 impetus to fat metabelism. Experiments on hens.] 



III. 578; 679 Microscopiuni ; Conservatio. 



67 Barnard, J. E. 578 



1909. The Microscope. Its practical Applications. Sclent. Amer. Sappl. 

 Vol. 68 p. 291. 



68 . . . 578 



1910. The Microscope and the Scientist. Some Applications of Micros- 

 copy to Modern Science. Scieut. Amer. Suppl. Vol. 69 p. 350—352, 



69 Brocher, Frank. 578 



1911. Le travail au microscope et Taccommodation. L'oeil, le micro- 

 scope, la chambre-claire et I'observateur. Rev. med. Suisse romande Ann. 

 31 p. 665-672, 2 figg. b78.2,.4,.6 



70 Gastou, Paul. 578 



1911. L'uitra-microscope et sa technique. Biologica Paris Ann. 1 p. 253 

 -256, 16 figg. 



71 Marinesco, G. 578 



1911. L'ultramicroscope comme methode d'investigation du system© 

 nerveux a I'etat normal et pathologique. C. R. Soc. Biol. Paris T. 71 

 p. 669—671. 



72 . . . 578 



1912. A Double Demonstrating Eye-piece. Knowledge Vol. 35 p. 275, 

 2 flgg. 578.2,.4 



73 Loeser, Rudolf. 578 



1912. Schiilerraikroskope und Hilfsapparate. Monatsh. nat. Unterr. Bd. 

 6 p. 264-273, 24 figg. 578.1,.4 



61574 Daufresne, Alexandre. 378.1 



1911. Un nouveau microscope d'enseignement. Cosmos Paris T. 64 p. 

 398-400, 3 figg. 



15. VII. 1912. 



