968 



ENERGETICS AND ENERGY-SOURCES [pt. iii 



following table, which summarises the average efficiencies at present 

 known. 



Table 122. 



A.E.E. (apparent energetic efficiency) 



[Synonyms: Rubner's " energetische 



Nutzungsquotient"'; Terroine 



& Wurmser's "rendement 



energetique brut"'] 



Average value for mammals ... 34-3 



(N.B. These values were not proved by 

 Rubner to hold for pre-natal life, and he 

 thought the average might there be slightly 

 higher, say, between 38 and 41 %) 

 Human embryo ... ... ... ... 5-2 



Experimentally Determined 

 Lecithic 



Chick embryo ... 



Chick embryo ... 



Silkworm embryo 



Minnow embryo 



Frog embryo (to hatching only) 



Frog embryo (to disappearance of ex- 

 ternal gills only) 

 Frog embryo (to end of yolk-sac) 



Alecithic 

 Sabellaria embryo 

 Ascaris embryo 



Experimentally Determined 



Cow adult 



Pig adult 



Mould, Aspergilltis niger 



Several points of interest are to be noted about this table. In 

 the first place, Terroine & Wurmser drew attention to the figure found 

 by Faure-Fremiet and Vivier du Streel for the development of the 

 frog, namely, 82 per cent., but this figure, though shown in the above 

 table, cannot be compared with the rest, for it only applies to the 

 development that takes place before hatching. It therefore resembles 

 the figure obtained by Barthelemy & Bonnet for the frog, i.e. 75-5 



