WEEDS IN LAWNS, DRIVES, ETC. 351 



pot on a sunny day is also stated to do much towards 

 clearing walks and pavements of weeds. 1 



WEEDS AND Moss ON STONEWORK, &c. 



Weeds are frequently found growing in the inter- 

 stices between stonework and on brickwork walls, 

 while Moss and Lichens may similarly disfigure stone 

 parapets, tombstones, &c. For the larger weeds, salt, 

 soda, and the other materials just mentioned may be 

 used as for walks and drives, but acids should never be 

 used on marble. Moss and Lichen may be removed 

 from tombstones, stone statuary, and so forth by spirits 

 of salts (hydrochloric acid), i pint of the acid to i 

 pint of water. The stone should be painted over with 

 the liquid, left for a few minutes, and then scrubbed 

 over with clear water. 2 



Moss AND LICHEN ON FRUIT TREES 



Moss and Lichen on fruit trees are troublesome and 

 obnoxious, and should not be allowed to cover up the 

 bark. Winter washing is the most useful means of 

 dealing with fi weeds " of this class. Lime-wash may 

 be applied in fine weather from January to March, but 

 this is not so useful as a caustic soda wash. The latter 

 (as used at the Woburn Experimental Fruit Farm) 

 is prepared by mixing 6 Ib. of caustic soda, ij Ib. of 

 soft soap, 2 gallons of paraffin, and 28 gallons of water 

 in the following manner : After dissolving the soft soap 

 in i gallon of boiling water the paraffin should be 

 added and the mixture thoroughly churned until a 

 creamy emulsion is obtained. The caustic soda should 

 then be dissolved in the remaining 27 gallons of water 



1 Journal of Horticultiire, October 4, 1906. 



2 Jbid,, December 12, 1907. 



