164 Dr . longfield’s 
fame purpofe, which ferves very well for inftruments 
that do not require great folidity : From hence I have a 
very extenlive view all round. In the obfervatory is a 
folid pier, funk deep in the ground, on the top of which 
Hands the tranfit inftrument. It is of tin, three feet and 
a half long, and made by Mr. monk. The other inftru- 
ments I have are the following : 
An equal altitude inftrument. 
A quadrant of one foot radius, by Mr. bird. 
Another of two feet and a half radius, of the French 
conftrudtion, not a bad one with regard to the divifions, 
but inconvenient. 
An excellent telefcope, with a treble objedt-glafs, by 
Mr. dollond. It magnifies about 140 times, and is of 
the lateft improvement. 
A parallaftic inftrument, with a common telefcope five 
feet long, and a reticule rhomboide. 
Two aftronomical clocks, with wooden pendulums, 
one of which goes full as well as Mr. woollaston’s. 
The alterations in their going feem to be owing to moif- 
ture. I conftantly compare them with smeaton's hy- 
grometer. 
With the affiftance of a particular friend, who is an 
excellent mathematician and a very good obferver [Mr. 
elias mainaduc], I have taken a great number of 
meridian 
