GENERAL INTEODUCTION TO THE ZOOLOGICAL REPORTS. 7 



now steams slowly to wiudward, oceupyijig successively the positions E, F, G, and H. 

 The weights, to which the water offers but little resistance, sinks from W to W, and the 

 dredge and bag move slowly from D to B. The vessel is now allowed to drift back 

 before the wind from H towards C. The pull of the vessel, instead of acting 

 immediately on the dredge, now drags forward the weight W, so that the dredging is 

 carried on from the weight and not directly from the vessel. The dredge is thus quietly 



Fio. 6.— Therelatnt ] 



1 til M i.lh WluIiI, ml tliL L)iLd„'L, at lulncut -la^'t, l1 ' I'aj iiy-out" from the Porcupine. 



pulled along with its lip scraping the bottom, in the attitude which it assumes from the 

 position of the centre of weight of its iron frame and arms. 



At 8.50 P.M. we began to haul in, and the pins to fill again. The donkey-engine 

 delivered the rope at the rate of a foot per second without a single check. A few 

 minutes before 1 a.m. the weights appeared, and a little after one in the morning. 



.1 



