250 ^he Statural Hijlory 
of Plants^ only that it has been found moft agreeable that San5U 
foiriy Ray-grafs^isrc, benotfown prefently after the 5^7r/)/, Oatsy 
or whatever other Grain it be fowed with, but rather after the 
Corn is come pretty high, fo that it may llielter the feed from the 
heatof thevSww, which, as is apprehended at leaft, is fomtimes 
prejudicial. And that in the Chiltern Country^ after they have 
eaten off their Ray-grafs or SanSi-Join^ they find it advantagious 
to fold it with Sheepj as other Corn-lands : which I thought good 
to note, !t being, as I am informed, but lately pra6:ifed. 
84. Amongft Arts that concern formation of Earths^ I (liall 
not mention the making of Pots 21 Marfi-Balden^ and Nuneham- 
Courtney^ nor of Tobacco-pipes of the White-earth of Shot-over j 
fince thofe places are now deferted. Nor indeed was there, that 
I ever heard of, any thing extraordinary performed during the 
working thofe Earths^ nor is there now of a very good Tobacco- 
pipe Clay found in the Paridi of Horfpath^ fince the Printing of the 
third Chapter of this Hiftory, Let it fuffice for things of this 
nature^ that the ingenious John Dvpight^ M. A. of Chrift Church 
College Oxon, hath difcovered the myftery of the fl:one or Co- 
logne W^res (fuchas D' Alva Bottles^ Jugs^ Noggins^ heretofore 
made only in Germany^ and by the Dutch brought over into En- 
gland in great quantities, and hath fet up a manufa^iure of the 
fame, which (by methods 2ind contrivances of his own, altogether 
unlike thofe ufed by the Gem^^/j-) in three or four years time he 
hath brought it to a greater perfeftion than it has attained where 
it hath been ufed for mzny Ages^ infomuch that the Company of 
Glafs-fellers^ London^ who zxQzht dealers for that cowz/Tzoii/)', have 
contraded with the Inventor to buy only of his Englijh manufa- 
fiurej and refufe the foreign, 
85. He hath difcovered alfo the myflery of the Heffian wares, 
and makes Veifels for reteining the penetrating Salts and Spirits 
of the Chymijls^ more ferviceable than were ever made in England, 
or imported from Germany it felf. 
86. And hath found out vpays to make an Earth white and 
tranfparentas /^prcg/Zdfw^, and not diftinguiffiable from it by the 
Eye^ or by Experiments that have been purpofely made to try 
wherein they difagree. To this Earth he hath added the colours 
that are ufual in the coloured China-ware, and divers others not 
feen before. The (kill that hath been wanting to fet up a manufa- 
^ure 
