[64] Boveri. Zellen-studien, V. Ueber die Abhängigkeit der Kerngrösse und Zellenzahl der Seeigellarven von der Chromosomenzahl der Ausgangszellen. Jena, 1905.
[65] Recent important researches suggest that such ultra-minute “filter-passers” are the true cause of certain acute maladies commonly ascribed to the presence of much larger organisms; cf. Hort, Lakin and Benians, The true infective Agent in Cerebrospinal Fever, etc., J. Roy. Army Med. Corps, Feb. 1910.
[66] Zur Erkenntniss der Kolloide, 1905, p. 122; where there will be found an interesting discussion of various molecular and other minute magnitudes.
[67] Encyclopaedia Britannica, 9th edit., vol. III, p. 42, 1875.
[68] Sur la limite de petitesse des organismes, Bull. Soc. R. des Sc. méd. et nat. de Bruxelles, Jan. 1903; Rec. d’œuvres (Physiol. générale), p. 325.
[69] Cf. A. Fischer, Vorlesungen über Bakterien, 1897, p. 50.
[70] F. Hofmeister, quoted in Cohnheim’s Chemie der Eiweisskörper, 1900, p. 18.
[71] McKendrick arrived at a still lower estimate, of about 1250 proteid molecules in the minutest organisms. Brit. Ass. Rep. 1901, p. 808.
[72] Cf. Perrin, Les Atomes, 1914, p. 74.
[73] Cf. Tait, On Compression of Air in small Bubbles, Proc. R. S. E. V, 1865.