Earls of Cromartie > [NSLBLANK]

MB. JAMES GREGORIE, 1675. 21
terrene west or north-west wind (according to your observation) doeth mani-
fest in the late storme. I could wish yee had had an baroscope : for I have
alwayes hitherto observed, that in great storms the mercurie falls extremlie
low, and consequentlie the aire is much lighter. I doe fancie from this, that
heavie aire is able to keep vp in it heavie and thick clouds and clamps,
which (the aire becoming lighter) falls with violence, and causeth storms
and winds. This alteration in the weight of the aire (for it is an mater of
fact) may come from the mixture of subterraneous stems, which ar agi-
tated by severall degrees of the heat of the sune, other celestial influences,
and perchance ewen some changes made by men on the surface of the earth.
I doe not hazarde (not being there my self) for an telescope above 9 or
10 foot longe, which may be had for 50s. or at most £3 sterling; it may
magnify the object in lenth or breadth betwixt 60 or 70 times. The concave
glasse for your sight may be had for 4 or 5 shillings set in an ivory frame ;
sealed glasse tubes for barrowmeters may be had for [ ] shillings a peece
or litle more ; an wheelbarrowmeter may stand 6 shillings or perchance some
more ; the thermometers hermeticallie sealed may be some cheaper.
If yee will writte to Hector Mackenzie to draw the money, I sail give
instructions to his correspondent, and write to the workmen with whom I am
acquaint to doe ther work well and to tak no more than they did from mee ;
and if I can doe any more, in that also I sail strive to acquite my self,
My Lord,
Your Lordships most humble and most obliged servant,
For the right honorable my Lord Tarbot — these.