200 GREENHOUSE AND WINDOW-GARDEN WORK 



To prerent boilers from filling with sediment or scale. 



(1) Exercise care t(3 get clean water ami that wliich contains little 

 lime. (2) Hlow it out often. It can be blown out a little every day, 

 and occasionally it should be blown off entirely. (3) Put slippery- 

 elni bark in the boiler tank. Or, if slippery-elm is not handy, use 

 |K)tato-i)eelinKs, flax-seed, oak-bark, spent tan, or coarse sawdust. (4) 

 Put in, with the feed-water or otherwise, a small quantity of good mo- 

 la^wes (not a chemical sirup), say one-half to one pint in a week, de- 

 pending upon the size of boiler. This will remove and prevent 

 incrustation without damage to the boiler. These vegetable sub- 

 stances prevent, in a measure, by mechanical means, the union of the 

 particles of lime into incrustations. 



To prepare paper and cloth for hotbed sash. 



1. Use a sash without bars, and stretch wires or strings 

 across it to serve as a rest for the paper. Procure stout but 

 thin manila wrapping-paper, and paste it firmly on the sash with 

 fresh flour paste. Dry in a w^arm place, and then wipe the paper 

 with a damp sponge to cause it to stretch evenly. Dry again, and 

 then apply boiled linseed oil to both sides of the paper, and dry 

 again in a wami place, 



2. Saturate cloth or tough, thin manila paper with pure, raw lin- 

 seed oil. 



3. Dissolve IJ pounds white soap in one quart water; in another 

 quart dissolve 1 1 ounces gum arable and 5 ounces glue. Mix the two 

 li(iuids, warm, and soak the paper, hanging it up to dr3\ Used mostly 

 for paiH'r. 



4. 3 |)ints i)ale linseed oil ; 1 ounce sugar of lead ; 4 ounces white 

 rosin. ( iriiid and mix the sugar of lead in a little oil, then add the other 

 materials and heat in an iron kettle. Apply hot with a brush. Used 

 U)T nmslin. 



Paint for hot-water pipes. 



Mix lampblack with boiled oil and turpentine. It is harmless to 

 plants. 



