M. Duti*«cliet on the Temperature of Vegetables, 103 



enumerated Uria Troile (in prodigious numbers), TJria grylle, 

 Colymbus sepfenfrionalis, Sterna hirundo, Larus glauciis, 

 Lams canns, Larus iridaciglus, Lestris catarractes, and a 

 Procellaria which we were not able to procure. Somateria spec- 

 tabilis and Larus eburneus are said to be met with only on 

 the northern coast. There also occur, according to the de- 

 scriptions given us. Mormon fratercula and Mergidus Alle. It 

 struck me as being extremely remarkable that no one has seen 

 a bh-d of the Auk family to the south of Kostin-Schar, for Alca 

 pica by no means belongs to the birds of extremely northern 

 regions, and Mormon fratercula occurs on the Norwegian 

 coast. 



There is no trace of the class amphibia in Nova Zembla. 

 Batrachian and saurian animals evidently cannot exist there 

 from the want of insects. 



The High North presents but few species of fish, even 

 where individuals abound. Scoresby enumerates only fom* 

 species of fish as occurring in Spitzbergen and the neighbour- 

 ing seas. My list of the fishes of Nova Zembla includes 

 10 species, all of which we saw except the Omul (Salmo 

 omul. Pall.), which is said to be found on the West coast. 

 The most important of these is the Golez (Salmo alpinus, 

 Fabr.), which ascends to the mountain lakes in autumn, and 

 in some years is taken in immense quantity and carried away. 

 All the other fishes are either unimportant or useless for com- 

 merce ; and, in the economy of nature, the only two that seem 

 of much consequence are the Gadus saida, Lep. and Cyclop- 

 terus liparis. 



Experiments on the Temperature of Vegetables with the Thermo- 

 Electric Apparatus. By M. Dutrochet.* 



Vegetables, in addition to a peculiar heat of their own, 

 have also that of the atmosphere. This lieat is totally ab- 

 sorbed by the vaporization of the sap, by the production of 

 oxygen during the day, and carbonic acid during the night. 



• Communicated to the French Academy of Sciences, in Juno 1888, and 

 read in June 1839. 



