380 ANNUAL REGISTER, 1800. 



•in a more complete and expedi-* 

 tious manner than has been hitherto 

 used. Dated Dec. 1 7- 



John Sharren Ward, of Bruton, 

 Somersetshire, silk- throwster; for 

 a machine, upon new and improved 

 principles, for the purpose of dou- 

 bling either silk, cotton, flax, herap, 

 worsted, yarn, or other threads- 

 Dated December 30. 



Thomas Grace, of Neat-House, 

 in the parish of Saint George, 

 Hanover-square, Middlesex, white- 

 lead-maker; for a method of mak- 

 ing an acid for corroding lead, and 

 for other purposes; and also a new 

 method of preparing and making 

 white-lead, either with or without 

 the said acid. Dated Dec. 30, 1800. 



Lawson Hudleston, of Shaftes- 

 bury, Dorsetshire, esq.; for the me- 

 thod of conveying boats or barges 

 from a higher level to a lower, and 

 vice versa, on canals. Dated De- 

 cember 30. 



Account of a Method of destroy- 

 ing Caterpillars on Gooseberri/- 

 Bushes; from the Prize-Essays 

 of the Highland Society of Scot- 

 land. 



A Receipt for this purpose 

 was offered to be communi- 

 cated to the society, by William 

 Henderson,at Baldridge-Burn,near 

 Dumfermline, on the 6th of Feb- 

 ruary, 1795, for a suitable reward. 

 The proposal was referred to a sub- 

 committee, of which Dr. Monro, 

 professor of anatomy in the Univer- 

 sity of Edinburgh, was chairman ; 

 . who after making trial of the re- 

 ceipt, gave in their report on the 1st 

 of July, 1796. The receipt for the 

 preparation, and the manner of 

 using it, was in the following words: 



Take one Scots pint of tobacco 

 liquor, which the manufacturers of 

 tobacco generally sell for destroying 

 bugs, and mix therewith about one 

 ounce of alum ; when the alum is 

 sufficiently dissolved, put this mix- 

 ture into a plate, or other vessel, 

 wide and long enough to admit of 

 a brush, like a weaver's brush, be- 

 ing dipped into it; and, as early 

 in the season as you can perceive 

 the leaves of the bushes to be in the 

 least eaten, or the eggs upon the 

 leaves (which generally happens 

 about the end of May, and which 

 will be found in great numbers on 

 the veins of the leaves on their un- 

 der side), you are to take the pre- 

 paration or liquor, and dip the brush 

 into it, holding the brush towards 

 the under side of the bush, which 

 is to be raised and supported by the 

 hands of another person ; then, by 

 drawing your hand gently over the 

 hairs of the brush, the above liquor 

 is sprinkled, and thrown in small 

 drops on the leaves: the conse- 

 quence of which is, if the eggs are 

 there, they never come forward; 

 and, if they have already generated 

 worms, in a minute or two after 

 the liquor touches them, they either 

 die, or sicken so as to fall off the 

 bush, at least they do so upon giving 

 it a little shake. If, upon their 

 thus falling off, they shall not ap- 

 pear to be completely dead, the 

 bush should be held up, and either 

 a little boiling water from a wa- 

 tering-pan thrown on them, or a 

 bruise given them by a spade or 

 shovel, or the earth where they lie 

 turned over with a hoe. This pre- 

 paration does not in the least injure 

 the bushes. 



The liquor here meant is gene, 

 rallv not in the same state it is ex- 



