Royal Society of London. 363 



in regard to beauty and quality^ will leave but little room 

 for t"u;ther exertions. 



The time bestowed on these objects, and the expenses 

 required for numberless trials, impose upon me the duty 

 of endeavouriivj to obtain a moderate restitution for both. 

 I have theretore resolved to publish my discoveries under 

 the title oi' " Discoveries and Inventions for preparing 

 new Mordants for Cotion and Linen, in order to produce 

 beautiful and lasting Colours ; with Instruction for pro- 

 ducing genuine Colours both for Block and Copper-plate 

 Printing, as also for Pencilling in all Shades." 



The whole will be divided under the following heads : 



1. Instructions for determining and preparing such sub- 

 stances as are required for the production of new mordants, 

 and colours for printing and pencilling. 



2. Instructions for compoundi..g new mordants. 



3. Instructions for compounding genuine and beautiful 

 colours for printing in all tints and shades. 



4. Instructions for compounding genuine and beautiful 

 colours of all tints for pencilling. 



To those who confide in my abilities and character, I 

 offer this work, by way of subscription, at the price of 

 three guineas; and at the expiration of March 1806 the 

 subscription will be closed, when the printing of it will 

 take place, and the price to non-subscribers will then be 

 five guineas. 



Berlin, S. F. HeRMBSTAEDT. 



Dec. 13, 1S03. 



Subscribers in London, or other parts of Britain, arc re- 

 quested to apply, post paid, to Mr. J. Hunneman, No. 6, 

 Frith-street, Soho, where subscriptions will be received, 

 and proper receipts given. Such as are not masters of the 

 German language, are informed that a translation of the 

 iibovc work will be undertaken by 



J. Hunneman. 



LXIX. Proceedings of Learned Societies. 



ROYAL SOCIETV OF LONDON. 



\_/N the evening of Thursdav, the 9lh instant, this society 

 assembled after the Christmas holidays, the right honoura- 

 ble Sir Joseph Manks, bart. president, in the chair. A sum- 

 mary of Mr. Brando's experiments on guaiacum, as. men- 

 tioned in our last month';, report, was read. In 100 grains 



of 



