178 GOODYEAR ON GUM-ELASTIC. 



REEL MEASURES. 



The cases of carpenter's reel measures are made of caoutchouc 

 whalebone. The measure, or tape, is made of gum-elastic vel- 

 lum, or of linen tape coated with gum-elastic compound. The 

 whole making an improved tape measure. See plate , figs. 



LEVELING RODS 



The large dimensions, and the use which is made of leveling 

 rods, require that they should be made of a material less liable 

 to spring or warp than any wood of which they have heretofore 

 been made. When moulded of caoutchouc, they may be made 

 hollow and light without being liable to either of these objec- 

 tions. Like scales and rules, they are graduated in moulds 

 when vulcanized. 



DRY MEASURES. 



Dry measures are made of caoutchouc whalebone and whale- 

 bone board. When formed of these materials, they are strong, 

 light, and durable. See plate , figs. 



WINE MEASURES. 



These articles are manufactured of caoutchouc whalebone. 

 They are moulded of this material in one entire piece. 



They are much lighter than metal ; they are preferable to tin 

 or copper, because they do not rust or corrode, and owing to 

 their elasticity, they are not, like tin or metal, liable to be in- 

 dented. See plate , figs. 



