The Marquis of ' Worcefter* 's Scantlings of Inventions. 43 v 



Pott has made known that orpiment contains only a 

 tenth of fulphur. As this fubftance paffes to the (rate of 

 realgar merely by the adfcion of heat, and afterwards repaflTes 

 to the ftate of orpiment by the contact of light, it is evident 

 that thefe two fubftances, fo different in colour, are compofed 

 of the fame elements. Having taken the real.ar pagoda from 

 the glafs cafe, I law that a part of it, which had not been 

 expofed to the immediate contact of the light, had retained 

 its colour and brilliancy. 



The realgar which is fublimated at the Solfaterra under the 

 form of octaedral cryftals, known under the name of ruby of 

 arfifiic, efflorefces aifo by the light. 



XI. The Marquis of Worceflcr' s Scantlings of Inventions. 



[This little trad, firlt published in 1651;, being not ealy to be met with, 

 we infert a copy of it at the rcqueft of a number of our readers, and 

 we flatter ourfelves it will be acceptable to all of them.] 



A Century of the Names and Scantlings of Inventions by me 

 already praclifed. 



^ I. Seals abundantly fgnificant. 



OEVERAL forts of feals, fome mowing by fcrews, others 

 by gages fattening or unfallening all the marks at once; 

 others by additional points and imaginary places, propor- 

 tionable to ordinary efcocheons and feals at arms, each way 

 palpably and punctually fctting down (yet private from all 

 others but the owner, and by his affent) the day of the 

 month, the day of the week, the month of the year, the 

 year of our Lord, the names of the witneffes, and the indi- 

 vidual place where any thing was fealed, though in ten thou- 

 fand feveral places, together with the very number of lines 

 contained in a contract, whereby falufication may be difco- 

 vered, and manifeitly proved, being upon good grounds fuf- 

 pecled. 



Upon any of thefe feals a man may keep accounts of re- 

 ceipts and diiburfeinents from one farthing to an hundred 

 millions, punctually mowing each pound, milling, penny, 

 or farthing. 



By thefe feals likewife any letter, through written but in 

 Englifh, may be read and under flood in eight feveral lan- 

 guages, and in Englifh itfelf to clean contrary and different 

 ienie, unknown to any hut the correfpondent, and not to be 

 read or undertiood by him neither, if opened before it arrive 

 unto him 5 fo that neither threats, nor hopes of reward, can 



make 



