66 



On the Rates of Chronometers. 



[No. 1. 



2. Do you consider that error 

 as due to a constant rate ? 



3. Did you see Madeira, or the 

 Cape De Verds,orTristan D'Acum- 

 ha, to ascertain your measured 

 differences of meridian by Chr. 

 and hence the alteration up to that 

 time? 



4. The same to Ceylon? 



5. Did your lunars also shew a 

 steady alteration of rate in theChrs. 

 or did they shew that it began from 

 a certain epoch as from the Cape ? 



6. Are your Chrs. placed this 

 voyage as in former ones, or is 

 there any alteration? 



7. Any iron knees, arm stands, 

 &c. near your Chrs. in their new 

 berth this voyage ? 



H. — I think the rates altered 

 more after passing the Cape. 



McL. — I believe it to have been 

 a uniform rate throughout, since 

 leaving, with the exception of one 

 watch which was materially affected 

 by temperature. 



L.— No. 



H. — I did, but not near enough 

 to take correct bearings. 



M C L. —I saw the Islands of Tri- 

 nidad and Martin Vas on the 21st 

 October, and found the means 20' 

 to 25' East of the truth. I ob- 

 tained the cross bearings of the two 

 Islands having constructed a chart 

 of their locality on a large scale 

 for the purpose, and under favour- 

 able circumstances obtained my 

 position, and thence an entire new 

 rate for my Chrs. which rate on 

 arrival only varied as follows : 

 No. 1, + 20"; No. 2, -f- 28".6; 

 No. 3, 6".4 being an error of 3' f 

 of the truth. L. — No. 



H— Not seen. M C L. — Notseen. 

 L.— No. 



H. — Yes. M C L. — Lunars from 

 25' to 30' to the Eastward. L.— 

 No. Variable. 



H. — None. M C L.— Have been 

 placed for eight years in the same 

 place, L. — The same. 



H.— None. M C L.— None. L. 



—No. 



