160 HORTICULTURIST'S RULE-BOOK. 



bears a rim or shoulder at the top. The breadth and depth of 

 these pots are the same, so that they " nest" well. 



ENGLISH. CHISWICK STANDARDS. 



Diam. 



at top. Depth. 



Thimbles 2 in. 2 in. 



Thumbs 2 2^ 



4 

 5 

 6 

 8 

 9 

 10 

 11 

 12 

 13 

 14 



9. To prevent boilers from filling with sediment or scale. 



1. Exercise care to get clean water and that which contains 

 little lime. 2. Blow it out often. It can be blown out a little 

 every day, and occasionally it should be blown off entirely. 

 3. Put slippery-elm bark in the boiler tank. Or, if slippery- 

 elm is not handy, use potato-peelings, flax-seed, oak-bark, spent 

 tan, or coarse sawdust. 4. Put in, with the feed-water or 

 otherwise, a small quantity of good molasses (not a chemical 

 syrup), say i to 1 pint in a week, depending upon the size of 

 boiler. This will remove and prevent incrustation without 

 damage to the boiler. These vegetable substances prevent in a 

 measure, by mechanical means, the union of the particles of 

 lime into incrustations. 



10. 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 



