October 14, 1920] 



NATURE 



219 



the principles of three-colour photography, includ- 

 ing even the present "screen-plate" processes, 

 such as the autochrome, Paget, and others. It 

 was impossible then to carry out these processes 

 satisfactorily, because it was not until 1873 that 

 Vogel discovered the possibility of sensitising 

 plates for colour, and it was still later that gela- 

 tine plates were commercially manufactured. 

 M. du Hauron was a pioneer also in motion 

 photography, stereoscopic work, and other 

 matters. 



The death occurred on September 27 of Dr. 

 D. Lloyd Roberts at the age of eighty-four 

 years. Dr. Lloyd Roberts was born in 1835 at 

 Stockport, and received his medical education at 

 the old Manchester Royal School of Medicine, and 

 afterwards in the hospitals of London and Paris. 

 In 1857 he obtained the diplomas of M.R.C.S. 

 (Rng.) and L.S..*\. ; two years later he received 

 the degree of M.D. from the L'niversity of St. 

 Andrews, and became F.R.C.P. (Lond.) in 1878. 

 During this period he was appointed honorary 

 physician to St. Mary's Hospital for Women and 

 Children, a post which he retained until his death. 

 In 1902 Dr. Lloyd Roberts was president of the 

 section of obstetrics of the British Medical Asso- 

 ciation, and he was al.so a member of numerous 

 other medical societies. He contributed many 

 papers to medical journals, and as early as 1876 

 published "The Practice of Midwifery," the fourth 

 edition of which was issued in i8g6. In other 

 spheres he will be remembered as the editor of 



Siv Thomas Browne's " Religio Medici," first pub- 

 lished in 1892, and for a short pamphlet read in 

 1914 before the Dante Society of Manchester on 

 "The Scientific Knowledge of Dante." 



M.ANV geologists in this country will regret to 

 learn that their old friend, Sven Leonhard 

 ToRNQUisT, the doyen of Swedish geologists, died 

 at Lund on September 6 from haemorrhage of 

 the brain. Tornquist's work on graptolites is 

 familiar to all who deal with Lower Palaeozoic 

 palaeontology and stratigraphy, and his writings 

 on the geology of the beautiful Siljan district in 

 Dalecarlia and on the relations of the Leptaena 

 limestone have been a guide to many visitors for 

 more than half a century. Papers were received 

 from him up to the present year, for he still re- 

 tained vigour of mind and body. 



We much regret to announce the death on 

 October i, at sixty-eight years of age, of Prof. 

 Italo Gigi.ioli, professor of agricultural chemistry 

 in the Royal University of Pisa, Italy. Also of 

 Prof. Yves Delage, professor of zoology at the 

 Sorbonne, Paris, and member of the .Academies 

 of Science and Medicine, on October 8, at sixty- 

 six years of age. 



The death is announced, on October 4, at sixty- 

 five years of age, of Dr. Max Maroules, secre- 

 tary of the Zentralanstalt fiir Meteorologie und 

 Geodvnamik at \'ienna. 



Notes. 



On Monday, October 11, H.R.H. the Prince of 

 Wales returned from his seven months' tour of the 

 West Indies and our Colonies in the Pacific Ocean. 

 When the Prince set out on March 17 it was intended 

 that he should pay a visit to the Indian Empire, but 

 this has been deferred until next year out of con- 

 sideration for his health. However, during his lonR 

 journey he has had an opportunity of seeing some of 

 the diverse lands and peoples which go to make up 

 the British Empire. To the credit of science, it can 

 be put on record that during the whole course of the 

 tour the Prince was never for a day out of touch with 

 London. Telegraphy and "wireless" have made con- 

 tinual communication possible. It is also noteworthy 

 that, in spite of encountering bad weather, the 

 Reno-am kept to her time-table with great accuracy ; 

 marine engineers are to be congratulated on this 

 remarkable achievement. The experience which the 

 Prince has gaine<l is invaluable to one who will some 

 day have the task of ruling the Empire. His Majesty 

 the King has voiced this sentiment in a letter which was 

 addressed to the Secretary of State for the Colonies for 

 transmission to the Governors-General and Governors 

 of the Colonies which have been visited. He says : 

 " May such mutual intercourse create fresh ties of 

 confidence and devotion between the Throne and the 

 generations, present and future, of these great lands, 

 and thus promote the unity, strength, and prosperity 

 NO. 2659, VOL. 106] 



of the Empire." The experience is also of importance 

 in the study of problems of the moment, of recon- 

 struction and all that it entails. That the Prince 

 himself appreciates this is apparent from the following 

 words from his reply to the address of welcome made 

 by the Mayor of Portsmouth : " We are still, I fear, 

 only at the beginning of the labours which are neces- 

 sary to restore our credit and prosperity after the 

 prolonged strain of the war, and I am deeply 

 interested in our problems of reconstruction, which 

 all parts of the nation must pull together to solve." 



I.N 1901 the German troops in Peking removed a 

 number of old astronomical instruments from the city 

 wall, and they were sent to Germany and erected at 

 Potsdam. By the Treaty of Peace it was stipulated 

 that they were to be restored. Col. Yate, hon. secre- 

 tary of the Central .Asian Society, announces in the 

 rimes of October 8 that twenty huge cases containing 

 these instruments have arrived in China. Six of the 

 instruments were constructed in 1673 by Father 

 Verbiest, S.J., and one in 1715 by Father Kegler, S.J., 

 and these are all copies of Tycho Brahe's instruments. 

 To make room for them on top of the wall Verbiest 

 removed thence two old instruments, which afterwards 

 were put up in a court at the foot of the wall, where 

 they stood until 190 1. These two instruments had 

 been erected in 1379 by the astronomer Ko-Show- 



