384 Home Nature-Study Course. 



mathematics, though I doubt if one trained in conic sections in college 

 would be able to work out the mathematical relations of the scales 

 to the cone. 



For the older classes the measuring of trees affords a practical 

 and delightful exercise in geometry. Any boy can construct with a 

 jointed pocket rule an instrument for measuring the height of trees, 

 as described in Roth, p. 171. Calipers for measuring the thickness 

 of^trees can also be made by any ingenious boy. After measuring 

 trees let the pupils compute the amount of lumber in each, using 

 the log scale given in Roth, p. 259. This will be a most useful and 

 practical exercise for the older boys and girls. 

 .^'^With English. ---Hesid with your pupils the following poems or 

 such parts as they will understand: Spirit of the Pine,'' by Bayard 

 Ta,y\or; To a Pine Tree, by Lowell. The work indicated in industrial 

 geography gives interesting topics for essays. 



BIBLIOGRAPHY. 



Among Green Trees, by Julia E. Rogers. (Mumford, $3.00.) 



First Book of Forestry, Roth. (Ginn & Co., $1.00.) 



Practical Forestry, Gifford. (Appleton's, $1.25.) 



A Guide to the Trees, Lounsberry. (Stokes & Co., $2.50.) 



Familiar Trees and their Leaves, Mathews. (Appleton's, $1.75.) 



Commercial Geography, Red way. (Scribner's, $1.25.) 



Cornell Teachers Leaflet No. 13. Evergreens and How they 



Shed their Leaves. 



A certificate will he granted to those who satisfactorily complete ten 



lessons or the year's work. 



Address all communications to the Editor. 



