PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 



Series B. Vol. 90. No. B 627. 



BIOLOGICAL SCI^I 



contents: ■ 



Page 



The Formation of Nitrites from Nitrates in Aqueous Solution by the Action 

 of Sunlight, and the Assimilation of the Nitrites by Green Leaves in 

 Sunlight. By BENJAMIN MOORE. D.Sc. F.R.S IS8 



Action of Light Rays on Organic Compounds, and the Photo-synthesis of 

 Organic from Inorganic Compounds in Presence of Inorganic Colloids. 

 By BENJAMIN MOORE, D.Sc, F.R.S.. and T. A. WEBSTER . .168 



Growth of Trees, with a Note on Interference Bands formed by Rays at 



Small Angles. By A. MALLOCK. F.R.S 186 



On the Efficiency of Muscular Work. By M. GREENWOOD. Captain 



R.A.M.C. (T.F.). Lister Institute of Preventive Medicine . . . I99 



The Galvanometric Measurement of " Emotive " Physiological Changes. By 



A. D. WALLER. M.D., F.R.S 214 



Obituary Notice of Fellow deceased : — Edward Hull (with portrait) 



xxviii — xxxi 



PRINTED FOR THE ROYAL SOCIETY and sold by 



HARRISON & SONS. 45. ST. MARTIN'S LANE. LONDON. W.C. 

 Price Three Shillings and Sixpence. 



No. B 627. 



June 1, 1918. 



