RECENT ADVANCES IN SCIENCE 23? 



of Pig Embryos for a Medical Embryology Course," by Allen 

 (Anat. Rec. vol. xiv. March 191 8) ; " Observations on the 

 Shape of the Erythroplastid in the Wing of the Bat," by Arey 

 {ibid. January) ; " Histology of the Sensory Root of the 

 Trigeminal Nerve of the Rat Mus norvegicus," by Hoag (ibid. 

 February) ; " Persistence of the Posterior Cardinal Veins in 

 an Adult Cat," by Metcalf (ibid. January) ; " Determination of 

 the Size of the Heart by Means of the X-rays," by Bardeen 

 (Am. Journ. Anat. vol. xxiii. March 191 8) ; " The Isolation, 

 Shape, Size, and Number of the Lobules of the Pig's Liver," 

 by Johnson (ibid.) ; " The Brachial Plexus of Nerves in Man, 

 the Variations in its Formation and Branches," by Kerr (ibid.) ; 

 " The Absence of Hernal Nodes in the Domestic Pig," and 

 " Some Observations on Megacytes in Lymphatic Tissues," 

 both by Meyer (ibid. May) ; and " The Position of the Inser- 

 tion of the Pectoralis Major and Deltoid Muscles on the Humerus 

 of Man," and " The Fontanella Metopica and its Remnants in 

 an Adult Skull," both by Schultz (ibid. January and March). 



General. — Hoskins, in a note on " Microscope Lamps for 

 Students " (Anat. Rec. vol. xiv. January 191 8) suggests, as a 

 satisfactory lamp, a sixteen-candle-power frosted electric bulb 

 dipped two or three times in an alcoholic solution of Bleu de 

 Lyon. One such lamp will provide sufficient light for four 

 students, and is quite inexpensive. 



Other papers include : " Some Considerations Regarding 

 Microscopical Technique," by McClung (ibid. May) ; "Is the 

 Influence upon Development, Metamorphosis, and Growth of 

 Thymus, when taken as Food, due to a Specific Action of that 

 Gland ? " by Uhlenhuth (Journ. Exp. Zool. vol. xxv. February) ; 

 and " Chondriosomes in the Testicle-cells of Fundulus," by 

 Duesberg (Am. Journ. Anat. vol. xxiii. January 191 8). 



ANTHROPOLOGY. By A. G. Thacker, A.R.C.Sc. 



The nationalities of Europe have been much under discussion 

 during the last four years ; indeed, apart from the progress of 

 the actual military operations, probably no other subject has 

 been so prominently before the public. Yet a surprisingly small 

 proportion of what has been written has been valuable or 

 even accurate. A serious knowledge of European ethnography 

 is still confined to a very narrow circle, and the ordinary jour- 

 16 



