S PUBLISHED MONTHLY 
Science and Industry 
OFFICIAL JOURNAL OF THE : 
Commonwealth Institute of Science and Industry. 
Vol. 2. DECEMBER, 1920. — No. 12 
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; PAGE 
Leader om wt a 3 oat ae) aks aye oy 705 
Editorial Notes ; fot as xt at = A oth pes 707 
Insecticide Investigations. Physical Research in California. ‘ina af 
Dusting versus Spraying. Inheritance of certain Characters with 
A Substitute for Nicotine. — Castor Oil Plant. 
New Industry. Uses of Castor Oil. 
Lespedeza as a Forage Crop. Freezing of Beet. 
RaAbeeery cea Chemico-Technical tiattiecereeoOre nen 
Nela Research Laboratories. Refrigeration Problems. 
War Achievements of Applied Chemistry. By A. E. Leighton, PLC.  ...  )718 
. Combined Sprays. By H. Mackinnon, B.A., B.Sc. i. SP See ar AtS 
Research—An Aid to Forest Perpetuation. By Raphael Zon er id 732 
The Dingo Question. By A. S. Le Souet : “F 440 preen 38 
Some Australian Essential Oils. By John K, Blogg... Des fc 742 
The Necessity for Research in the Oil-Shale Industry. By Martin J. Gavin 746 
Black-boy and its Uses. By ©. EB. Lane Poole ... ae ator k- Fae 761 
Scientific and Technical Societies Be bY a = i 765 
re “5 PER ‘Within Commonwealth, 10s. per Ann., Post Free. : 
P rice Is. COPY. Ontside Commonwealth, 1s. Gd. per Ann., Post Free. 
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