Chap. V. CLAVERING AND SABINE. ] 35 



and industry, not easily to be paralleled. It consists 

 of more than five hundred pages of observations 

 carefully arranged, under various heads, made with 

 transit instruments, chronometers, clocks, and pen- 

 dulums ; containing besides numerous experiments 

 at the several stations touched at by Commander 

 Clavering, as already noticed, amounting to eight in 

 number on the two sides of the Atlantic, at each of 

 which the chief authorities manifested the utmost 

 readiness to afford everv assistance, both in our own 

 colonies and at places belonging to foreign powers. 



Any attempt here to explain them would give 

 but little notion of the labours successfully accom- 

 plished by Captain Sabine ; the tables detailing the 

 several kinds of observations must be seen in order 

 duly to appreciate their importance, to say nothing 

 of the calculations necessaiy to arrive at the deduc- 

 tions and conclusions which have resulted from them. 

 The observations may be stated to comprise a series 

 of six in number at each station : — No. 1. Times of 

 transit of stars to ascertain the rate of the clock ; 



>. 2. Adjustment of telescope to the same vertical 

 plane ; No. 3. Daily rate of chronometers from pre- 

 2 sding transits ; No. 4. Comparison of chronometer 

 and clock at exact intervals ; Nos. 5 and 6 comprise 

 an account of the coincidences in the double series 

 of each pendulum. Each .able of course occupied 

 several days. 



The Pheasant left Sierra Leone early in April, and 



