October 29, 19 14] 



NATURE 



247 



28, ■■ Camp, Ship, and Hospital Hygiene," Dr. A. T. 

 Nankivell ; December 4 and 11, "Government and 

 Military Sanitation in the Tropics," Sir Ronald Ross; 

 January 15, 22, and 29, "VVar and Disease," Dr. 

 F. M. Sandwith. With the sanction of the Medical 

 Director-General of the Navy and by arrangement with 

 the Surgeons-General of the respective ports, a course 

 of three Chadwick Lectures on naval hygiene will be 

 given by Prof. W. J. Simpson, at Portsmouth, on 

 November 27 and December 4 and 11, and at Plymouth 

 on November 2$), December 5 and 12. Further par- 

 ticulars of these and other Chadwick Lectures may be 

 obtained from the secretary', at the offices of the Chad- 

 wick Trust, 8 Dartmouth Street, Westminster. 



SOCIETIES AND ACADEMIES. 

 Paris. 



Academy of Sciences, October 12. — Ed. Perrier in the 

 chair. — H. Douville and M. Conyat-Barthoux : The 

 massif of Moghara, to the east of the Isthmus of 

 Suez. — ^Andre Blondel : New diagram of alternators 

 with projecting poles. — B. Jekhowsky : The determina- 

 tion of the difference of longitude between London 

 and Nice by wireless telegraphy. The radio- 

 telegraphic method described by Claude, Ferrie, and 

 Driencourt was employed. The difference of longitude 

 between Paris and Nice was found to be 

 oh. 19m. 51-2045. ± 006s. — E. F. Gantier : A Pliocene 

 volcano at Tigri, in eastern Morocco. — Stanislas 

 Meonier : The presence of chondria in caillite ; conse- 

 quences for the mode of formation of the meteoric 

 irons. 



Cape Town. 



Royal Society of Sooth Africa, September 16. — Dr. L. 

 Peringuey, president, in the chair, — A. E. V. Zealley : 

 The great dyke of norite of southern Rhodesia : 

 petrology of the Selukwe portion. The well-known 

 great dye of southern Rhodesia extends for some 

 300 miles throughout the territory, and has a width 

 of outcrop of about four miles. It has usually been 

 regarded as composed of ultra-basic rocks, such as 

 picrite. The author, however, takes the view that it 

 should be termed a dyke of norite. — H. A. Wager: The 

 Mosses of South Africa. The author gives a cata- 

 logue which he states is the first attempt that has 

 been made of publishing a list of the Mosses already 

 recorded from South Africa, except for a small cata- 

 logue of the Mosses of Cape Colony published by J. 

 Shaw in 1878. — ^T. F. Dreyer : A Mesostoma from 

 Bloemfontein (M. karrooense, n. sp.). A description is 

 given of this new species of worm obtained from a small 

 temporary pond on clay soil, which is alwa3's con- 

 taminated with cattle droppings. — Dr. T. Mnir : Note 

 on Hesse's generalisation of Pascal's theorem. The 

 purely geometrical theorem known as Pascal's was 

 investigated by Cayley and others as a theorem in 

 co-ordinate geometr}-, and Hesse, in doing so, had 

 the good fortune to employ certain identities which he 

 saw to be capable of a wider application, and thus 

 to lead to a generalisation of Pascal's geometrical 

 result. The present paper extends the said identities 

 and seeks to place them in their natural relation to 

 others of importance in a different domain. — H. 

 Bayon : Herpetomonidae found in Scatophaga hotten- 

 tota (Diptera) and Chamaeleon pumilus (Lacertilia). 

 Descriptions are given of flagellate protozoa found as 

 parasites in the common "blind-fly" on Robben Island 

 and in the chamaeleon. Though slight differences in 

 size and appearance are noticeable in these Herpeto- 

 monads from diff^erent sources, still they certainly are 

 not more marked than those found in samples taken 



NO. 2348, VOL. 94] 



from the same artificial culture of Leishmania at a 

 few days' interval ; therefore it does not seem advis- 

 able at the present stage of our knowledge to postu- 

 late two distinct species of protozoa. It does not seem 

 excluded that a chamaeleon can get infected through 

 swallowing a fly containing Herpetomonidae in its gut. 



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