(Repr. from the « American Journal 

 of Sèiencei», voi. Ili, pp. 117-122). 

 Washington, 1922. 8°. 



Miner R. J. — The Graduai Withdrawal 

 Method of Treating Morfdiinism : a 

 Mathematical Note (From the « Johns 

 Hopkins Hospital Bulletin », volume 

 XXXII . Baltimore, 1921. 8°, pp. 13. 



Pais A. — Radioeccitamento degli organi 

 ematopoietici nel tifo addominale. 

 Roma, 1922. 8°, pp. 1-11. 



Pearl R. — A biological classification 

 of the causes of Death (From 

 u Metron », voi. T, pp. 92-99). Rovigo, 

 1921. 8°. 



earl R. — A further Note on War and 

 Population (Repr. from «Science», 

 voi. LUI, li. 1362, pp. 120-121). Was- 

 hington, 1921. 8°. 



Pearl R. — A statistical Note on epi- 

 demie Encephalitis (From the « Johns 

 Hopkins Hospital Bulletin », volume 

 XXXII). Baltimore, 1921. 8°. 



Pearl R. — Influenza Studies (From the 

 «Public Health Reports »). Washin- 

 gton, 1921. 8°, pp. 1-27. 



Pearl R. — Modem Methods in Handling 

 Hospital Statistics (From the « Johns 

 Hopkins Hospital Bulletin », volume 

 XXXII). Baltimore, 1921. 8°. 



Pearl R. — Studies on the physiology of 

 Reproduction in the domestic Fowl. 

 XIX. On the Influence of free Choice 

 of food materials on Winter egg Pro- 

 duction and Body Weight (Repr. from 

 the « American Journal of Hygiene », 

 voi. L, pp. 253-277). 



Pearl R. — The Biology of Death ; I. The 

 Problem - II. Conditions of Cellular 

 Immortality - III. The Chances of 

 Death - IV. The Causes of Death - 

 V. The Inheritance of Duration of Life 

 in Man - VI. Experimental Studies on 

 the Duration of Life - VII. Naturai 

 Death, public Health, and the Popu- 

 lation Problem (Repr. from the « Scien- 

 tific Monthly », 1921. pp. 193-215, 

 321-335, 443-456, 489-516, 45-65, 143- 

 162). Baltimore, 1921. 8°. 



Pearl R. — The Signifìcance of Biometry 



and vital Statistics to the Science of 

 Medicine, s. 1., s. d. 8° 



Pearl R. — Variation in the Rate of Infant 

 Mortalily in the United States Birth 

 Registration Area (Repr. from. the 

 « Transactions of the Eleventh Animai 

 Meeting of the American Child Hygiene 

 Association », St. Louis, 11-13. 1920). 

 Baltimore, 1920. 8°. 



Pepere A. — Ghiandole a secrezione in- 

 terna. Torino, 1922 8°, pp. i-xi, 1-319. 



Reed L. J. — Fitting Straight Lines 

 (Extr. da « Metron », voi. I, n. Ili, 

 pp. 56-60). Rovigo, 1921. 8°. 



Silvestri F. — Description of a new Spe- 

 cies of Embiidae from Southern Nige- 

 ria (From the « Transactions of the 

 Entomologica] Society of London », 

 pp. 449-451). London, 1922. 8°. 



Silvestri F. — Stato attuale della lotta 

 contro la mosca delle olive (Estr. dagli 

 « Atti del I Congresso di arboricoltura 

 meridionale»). Roma, 1922. 8°, pp. 1-31. 



Travis Howard. — The real Risk-Rate 

 of Death to Mothers from Causes con- 

 nected vvith Childbirth (Repr. from 

 the « American Journal of Hygiene », 

 voi. I, pp. 197-233). s. 1., 1921. 8°. 



Tummarello A. — Su i sistemi omaloidici 

 costituiti da monoidi aventi contatto 

 di second'ordine nel vertice (Estr. dalle 

 «Note e Memorie di Matematica», 

 voi. I, pp. 289-298). Catania, 1921. 8°. 



Tummakello A. — Una nuova trasforma- 

 zione birazionale (n , 2n — 3) dello 

 spazio a tre dimensioni. Le superficie 

 di de Vries (Estr. dalle « Note e Me- 

 morie di Matematica », voi. I, pp. 292- 

 298). Catania, 1921. 8°. 



Washington H. S. — Aphthitalite from 

 Kilauea (Repr. from the « American 

 Mineralogist», voi. VI, n. Vili, pp. 121- 

 125). Washington, 1921. 8°. 



Washington H. S. — Mineralogy. Augite 

 of Haleakala, Maui, Hawaiian Islanda 

 (Repr. from the « American Journal 

 of Science », voi. Ili, pp. 177-122). 

 Washington, 1922. 8°. 



Washington H. S. — Obsidian from Copan 

 and Chichen Itza (Repr. from the 



