40 GOODYEAR ON GUM-ELASTIC. 



Rules of different kinds, both solid and hollow, are made very- 

 complete of caoutchouc ivory and whalebone. 



PORTFOLIOS. 



A superior portfolio is made of caoutchouc board or whale- 

 bone combined wdth gum-elastic vellum instead of morocco. 

 The tablet is sometimes made with an extra thickness of vellum, 

 or a sheet of the gum-elastic sponge fabric overlaying the cover, 

 either of which forms a superior tablet for writing upon. 



DESK COVERING. 



Gum-elastic felt or vellum is a very cheap and suitable ar- 

 ticle for the covering of counting-house, portable, and school 

 desks. It is easy to write on a single sheet of paper upon either 

 of these articles. 



MAP CARPETS. 



Different kinds of map carpets are found useful for the cover- 

 ing of floors, or the aisles of academies. These carpetings are 

 variously described, Chapter , but that which may be par- 



ticularly recommended for school-houses on account of its 

 cheapness and softness, preventing noise, is the cotton or woolen 

 fibrous article. 



■is^m 



