( 3n) 
them. Oar Fen Geefe, v/hen taken up and Fed with 
Corn, become as good as others. After the prcfTing 
out the Oyi from the Coal-Seed, the r mainder is cal- 
led Cakes, which here they heat 0» .;ns with, and 
burn for Fewel (but fmell ftrong) we Export them to 
Holland, where they feed their Kioe with them, which 
doubtkfs muft yield Milk, ^c. if Tweet tafted. 
About Five or Six Miles above this Town when the 
Fens are drowwd, they c^t the River Bank for about 
Thirty Yards» difcharging vaft quantities of Water 
which keeps back the Flood. 
Sir, There were feveral other Obfervations. which 
might have been added to that piece but being above 
my Level, and beyond my Survey, and not fo proper 
for this Difcourfe, I here omit. 
IV. A Letter from Mr. Stephen Gray, gi- 
ving a further Account of his Water Mi^ 
crofcope. 
SIR, 
MY Experiments and Obfervations Microfcopical, 
having been thought worthy to be incerted in 
your Philofophical TranfaStions, I prefume the Addi» 
tions and Improvement I have now made to the Wa- 
ter Microfcope may be no lefs acceptable, I therefore 
herein fend you its Defcription and Ufe according to 
my laft Contrivance whereby it not only renders Ob- 
jed:s more diftinft, but is much more Commodious for 
Obfervation. 
It confifts of Five parts or pieces of Brafs, whofe 
Form and Combination is according to my rude Draught, 
ExprelTed by the annexed e Figure Fig ,2, A, B. I call 
tlie 
