1852.] ANATOMICAL SHRIMPS. 143 



spring-bell was attached. At the instant this tooth be- 

 came released, at the passage of the inch division, the 

 board, ballasted with the bell, in its attempt to recover 

 a vertical position, vibrated over the described arc, and 

 cansed the alarum to warn the observer to note time. 

 At one period I contemplated leading it by a fine brass 

 rod into my cabin, but I soon found I had quite enough 

 of other matter to occupy my attention. After this had 

 acted satisfactorily for some days, in comparison with 

 the gaiige on shore, the latter was removed, the ice form- 

 ing too fast about it to be of further use. 



The gauge in the diagram is ascending past twelve 

 feet seven inches; at twelve feet eight inches the bell, 

 being drawn up to the side of the gauge-frame, will 

 vibrate, on its release, nearly to the same distance that 

 it was drawn out of the perpendicular, the tooth of the 

 wheel being so calculated as to pass freely at the instant 

 of release at each inch, and is not taken up again until 

 it has moved over a quarter of an inch. This alarum 

 eventually became troublesome, and, finding the atten- 

 tion of the observer coidd be ensured, it was latterly 

 muffled. 



Our specimen-net was sent down, charged with the 

 heads of bears and other animals, to be cleaned by the 

 shrimps, as they are termed, but a species of Oniscus or 

 sea-louse. Two eels* were taken, which rather discoun- 

 tenances the idea of their not bearing cold ; I am not 

 quite sure, however, that they were truly eels. The take 

 of these Crustacea was so plentiful, and they were so large, 

 that some of our gourmands attempted to substitute 

 * This question not decided. 



