TRANSACTIONS OF SECTION I. 75D 
Table showing the Amount of Air exchanged per Respiration and per Minute by 
various Methods, as well as under Natural Respiration, with the Subject 
Supine and Prone :— 
Amount of Air per Amount of Air per 
Method Raspitedtonh | Minute : 
Natural respiration: subject supine . | 489 cub. cent. | 6460 cub. cent. 
» 9 a) (yPFOne.,) 422) pris |) 5240 vy 
Traction with pressure: subject supine 
(Silvester method) . : F : LTS ign sal 39 2280) 55) al 
Rolling with pressure (Marshall Hall | 
method) . i : : é ‘ 7%, SS 33005 tsa bass 
Intermittent pressure: subject supine 
(Howard’s method) . a : mall pa hia saree: ADZ0 Ie ah tase 
Intermittent pressure: subject pron F DAO sel ais, GTGO7 Tee a5 
2. The Necessity of a Lantern Test as the Official Test for Colour 
Blindness. By Dr. F. W. EpripGr-GReen. 
The author described two cases, both naval lieutenants, which he had 
examined. In both instances the men passed the wool test, but failed when 
examined by the lantern test. These were selected because both had daily 
experience with coloured lights, and not with wools. He concluded that because 
a man can sort wools correctly it does not follow that he can distinguish between 
coloured lights. In the author’s opinion many varieties of colour blindness may 
escape detection by the wool test. 
wy 
TUESDAY, AUGUST 23. 
The following Papers were read :— 
1. On Protamines. By Professor A. Kosset and H. D. Daxin. 
Formerly the current view on the structure of proteids was that the differences 
between them were to be regarded as quite superficial. It was thought that the dif- 
ferent proteids were, for physiological purposes, interchangeable, so that one might 
without serious error substitute one proteid substance for another, Such a view is 
no longer tenable, and we have now no right to conclude that the proteid of muscle 
is equivalent as a source of energy with proteids derived from milk or from maize. 
Their chemical constitutions are different, and as a consequence we must assume 
a corresponding difference in their properties. For example, the amount of argi- 
nine in different proteids is very different Some of the constituent groups are 
not found at all in certain proteids; thus lysin is completely absent from the 
proteids of corn and maize, which are soluble in alcohol. There are in addition 
proteids in which the number of different groups is very small, as is the case with 
the protamines, 
In this class we find only four or five out of the seventeen or eighteen atomic 
roups which occur in the majority of proteids. On the other hand, in the con- 
jugated proteids we have proteids that contain many very remarkable components, 
groups of the most diverse kind, which associate themselves with the already 
numerous components of the proteid molecule, and so increase the complexity of 
the whole. 
The protamines offer the simplest relations for investigation. One of these 
substances, salmin, which originates from the spermatozoa of salmon, has, when 
3c2 
