18 



METRIC MEASUREMENTS AND THEIR 

 ENGLISH EQUIVALENTS. 



The metric system adopted iu tliis Biilletiu is now 

 quite generally employed in botanical and otber scien- 

 tific publications. For those unfamiliar with this sys- 

 tem the following expression of equivalents may be 

 useful : 



1 milliiiK-tre (1 mm.)=oue tweuty-fifth of au inch — exactly 

 0.0394 iiube. 



1 ceutimetre (1 cm.)^uearly one-half of au inch ; l()cm. = ;ilioiit 

 4 inches. 



1 il^cimi'tre (1 dm. ) = about 4 inches, or 3 dm.^oue foot. 



1 mitre (1 m. ) = about 3 feet 3ii inches — exactly 39.37079 inches. 



