Notes. 
According to Gautier, Scolosieboff, Caillol, and Liron, Under 
the influence of arsenic an increased quantity of phosphoric acid 
is eliminated, and the glycero-phosphoric acid of the brain is 
replaced by glycero-arsenic acid. 
Mr. J. Evans has presented to the Royal Society a report, by 
Mr. A. Hart Everett, on the exploration of the caves of Borneo. 
The results may be pronounced mainly of a negative character. 
Human and animal bones have been found in the caves, but no 
light has been thrown on the origin of the human race, the his- 
tory of the development of the fauna characterising the Indo- 
Malayan sub-region has not been advanced, nor has any evidence 
been obtained showing what races of men inhabited Borneo pre- 
viously to the immigration of the Malayan tribes. The north- 
west of Borneo has probably been elevated above the waters of 
the sea at too recent a date to give room to hopes of discovering 
cave-deposits of higher antiquity. Mr. Everett recommends 
explorations in the loftier portions of the island in the north-east. 
The “ Telegraphic Journal ” of April ist contains a description 
of a new form of lamp for the electric light, which has recently 
been invented by Mr. Charles Stewart, M.A. It consists of a 
number of square carbon rods placed radially upon a disk of 
wood or metal in such a mariner that the inner ends of the 
carbon rods form a complete circle. There is a circular opening 
in the wooden disk through which the electric light is seen from 
underneath. The carbons, which are all forced towards the 
centre by a uniform pressure, move forward as they are con- 
sumed, and together form the positive electrode of the lamp. 
The negative electrode consists of a covered hemispherical cup 
of copper, which, before the current enters the lamp, rests upon 
the ring formed by the carbons. On the current entering the 
lamp an electro-magnet raises the metal electrode, and the 
electric arc is then formed between the circle of carbons and the 
metal electrode. There is a flow of water through the latter to 
keep it cool. The advantages which this lamp possesses are — 
(i.) It is automatic in its action. (2.) It is capable of burning 
for a very considerable period. (3.) It does not throw any 
shadows. (4.) It is of simple and comparatively inexpensive 
construction. (5.) The intensity of the light may be increased 
if so desired. This Is the second lamp for the electric light 
which Mr. Stewart has recently invented. 
Ereatum. 
Page 185, line 6 from bottom, for “ oxygen and nitrogen ” read “ oxygen 
and hydrogen.” 
