SCIENCE AND INDUSTRY. 
(i) Gas Masks for Rescue Work in Mines and Factories.—Infor- 
mation as to suitability of different filtering materials and 
~ absorbents. > te 
(j) Manufacture of Baking Powder—General®information. “°° 
(k) Luminous Paints—Composition and methods of manufac- 
ture. ‘ 
(1) Boiler Lagging.—Suitability of various Australian raw 
materials. : 
(m) Lime Hydrate—Process of manufacture. 
(n) Duplicating Paper—Method of manufacture. 
(0) Flue Dust.—Analyses and advice as to commericial uses, 
— 
STANDARDIZATION IN THE ELECTRICAL INDUSTRY. 
The Sub-committee of the Electrical Association of Australia, which 
is co-operating with the Institute in the above matter, has now made 
recommendations with regard to the voltage at consumers’ terminals 
and transformer sizes. The Sub-comiittee first devoted its attention 
to the question of uniformity in the voltage of alternating current supply, 
and in 1918 it made a recommendation that the standard frequency 
should be 50 cycles, provided that a frequency of 25 cycles might be used 
under special circumstances. The new recommendations are as 
follow :-— 
1. Voltage at Consumers’ Terminals— | 
“That the standard voltages at consumers’ terminals shall be 
230 and 460 volts for a three-wire continuous current supply and. 
230 volts between the neutral and any phase of a three-phase supply, 
but in those cases where a lower voltage is justifiable such voltage 
shall be 115.” 
2. Transformer sizes— 
“That. the standard output capacities of transformers shall be 
2%, 5, 10, 15, 25, 50, and 100 K.V.A., but that the 24 and 5 K.V-A. 
sizes shall be standards for pressures up to but not exceeding 
5,000 volts.” me 
SCIENTIFIC LITERATURE IN NEW SOUTH WALES. 
A well attended meeting was held last month at the Education 
Department, Sydney, to discuss the manner-in which the ‘usefulness 
of the Public Library can be extended in connexion with’ scientific and 
trade literature. Mr, F. Leverrier, K.C,, B.Se., Chairman of the New 
South Wales State Committee of the Institute, explained the object of 
the meeting, and pointed out that both scientific and industrial men are 
equally interested in the importance of technical literature. A com- 
mittee, including representatives of the Royal Society of New South 
Wales and its Industrial Section, the Australian Chemical Institute, the 
Society of Chemical Industry, and the’ Sydney Technical ‘College 
Chemists’ Society, was appointed to wait upon the Government to urge 
the necessity for more commodious library premises and for increasing 
the grant to the Public Library for the purchase of scientific periodicals 
268. 
