THE STUDY OF PLANT ENZYMES. 115 
The Study of Plant Enzymes, particularly with relation to 
Oxidation.— Report of the Committee, consisting of Mr. 
A. D. Hatt (Chairman), Dr. E. F. Armstrone (Secretary), 
Professor H. E. ARMSTRONG, Professor F. KEEBLE, and Dr. 
EH, J. RUSSELL. 
THE Committee have made considerable progress in the investigations 
which they have undertaken. The following is a list of communica- 
tions by members of the Committee submitted to the Royal Society 
and published during the past year :— 
(a) ‘ Herbage Studies,’ I. ‘ Lotus corniculatus, a cyanophoric 
plant,’ by H. E. Armstrong, E. F. Armstrong, and E. Horton. 
(b) ‘Studies on Enzyme Action’: XV. ‘ Urease, a Selective 
Enzyme,’ by H. E. Armstrong and E. Horton. 
(c) ‘ The Distribution of Oxydases in the Plant and their réle in 
the Formation of Pigment,’ by F. Keeble and E. F. Armstrong. 
(d) ‘Studies on Enzyme Action’: XVI. ‘The Enzymes of 
Emulsin, (i) Prunase, the correlate of prunasin,’ by H. HE. Arm- 
strong, E. F. Armstrong, and E. Horton. 
(e) ‘Studies on Enzyme Action’: XVII. ‘Enzymes of the 
Emulsin type, (ii) The distribution of B-enzymes in plants,’ by H. E. 
Armstrong, E. F. Armstrong, and E. Horton. 
(f) ‘ Studies on Enzyme Action’: XVIII. ‘ Enzymes of the Emul- 
sin type, (ili) Linase, and other enzymes in Linacee,’ by H. E. 
Armstrong and J. V. Eyre. 
(g) ‘The Oxydases of Cytisus Adami,’ by F. Keeble and E. F. 
Armstrong. 
Much preliminary work has been done in directions other than those 
considered in these communications, particularly with the object of 
throwing further light on the nature of the oxydases, the manner in 
which they act and the part they play. The subject is one of great 
complexity and difficulty, and it is clear that it will be necessary to 
extend and multiply observations and experiments in a variety of fields 
if definite conclusions are to be arrived at. It is impossible to study 
the already voluminous literature of the subject and not be struck by 
the absence of proof that the oxydases are selective agents comparable 
with enzymes; at most it has been shown that their activity is of a 
catalytic order and usually limited, a particular oxydase apparently 
exercising its effect only within a certain group of compounds. 
The Committee ask to be reappointed with a grant of 301. 
Dynamic Isomerism.—Report of the Committee, consisting of 
Professor H. E. ArmMsTRONG (Chairman), Dr. T. M. Lowry 
(Secretary), Professor SypNEY Youne, Dr. C. H. Desscu, 
Dr. J. J. Dopsie, Dr. M. O. Forster, and Dr. A. LApwortu. 
(Drawn up by the Secretary.) 
Camphorcarbozamide and Camphorcarboxypiperidide.—During the past 
year an investigation has been completed of the isomeric changes taking 
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