t 291 ] 
per'Dzf' BifF,. 
The firft greateft lofs was 
The next greateft gain 
The next greateft lofs 
Dec. 1770 or — 1,9 
June 1771 +2,4 
G61. 1771 
- 1)9 
4)3 
4)3 
Feb. 1772 or — 0,86 
The clock was cleaned November 1771, and might 
not be reckoned to get to any ftated rate till the begin- 
ning of the next year ; after whichj 
DifF. 
// 
8569 
7,92, 
6,26* 
5)8/ 
4) 65 
5 ) 8 5 
+ 7)83 
— 0,09 
+ 6,17 
+ 0,30 
+ 4)95 
-0,90 
The firft greateft lofs was 
The next greateft gain. July 1772 
The next greateft lols Ja-n. 1773 
The next greateft gain Aug. 1773 
The next leaft gain Feb. 1774 
The next greateft gain Aug. 1774 
The next ereateft lofs to 1 
, 1 r ^Dec. 1774 
the end or that year, J 
Hereby July and Auguft appear to be the months for 
greateft acceleration, and January and February for re- 
tardation; contrary to the affe6lion of metalline rods, , 
but agreeable to the efte6l to be expe6ted from moifture- 
upon wood. Yet this difference is not fo great in any 
degree, nor (what is more material to obfervation) by 
any means fo fudden in its changes, as what is occa- 
fioned by heat upon metals. And even this, perhaps, 
might be obviated by a. ftrong coat of varnifli on the - 
rod, or fome preparation of the wood itfelf. . One 
thing it may be proper to mention, as an accidentaf ex- 
perience I have had the laft year ; that a clock fo fixed^^ 
witlii 
