[ ] 
I take notice of any thing remarkable in the Works 
of Nature or Art), to fee if any ingenious Perfon had 
recorded his Opinion upon this Subjed : And I found 
(N°. 127.), that an anonymous Author had made fe- 
veral Attempts to conftrud Hygrometers of Deal 
Boards * } and again (NV 129.), that Mr. J. Corners 
had added fome Improvements thereto 5 but, as the 
Method taken by thefe two Gentlemen feemed liable 
to fome Objedions, I determined to make a Trial on 
a Plan and Form intirely different from theirs 5 and 
have been fo fortunate to find it fucceed greatly be- 
yond my Expedations. 
My Way was thus : 
I procured a Piece of coarfe Deal Board 5 moft of 
it, if not all, Sap. From this I fa wed feven Pieces 
crofs the Bate or Grain, 10 Inches Jong and an Inch 
broad ; and as the Board was juft an Inch in Thick- 
nefs, I thereby confequently obtain'd 7 Parallelepi- 
peds of an Inch fquare each. 
Thefe 7 Pieces of Deal I joined together, length- 
ways, with ftrong Glew ; which made a fquare Rod 
of 70 Inches long.* 1 found itneceflary to place thefe 
fmali Pieces in fuch a manner, when I glewed them 
together, in refped to their Grain, as is reprefented 
in the two Figures annex'd, to prevent their forming 
themfelves into a Sort of Curve 5 which they natu- 
rally do, if they are placed all the fame Way ; and 
I found myfelf obliged to fix the Rod in fuch a Num- 
ber of Brackets as appear in the Drawings, in order 
to keep it ftrait. I placed 
* This Author fays, Poplar would do much better 1 but of that I have 
had no Trial. 
Aa 2 
