574 



THE INDIA RUBBER WORLD 



[September 1. 1912. 



254 



53 



7.5 



3.37 



Bi ?%. 



.l^^i?-^-i 



was somewhat high — working out at 39 cents (U. id.) per lb. 

 The trees were manured with sodium nitrate three days before 

 the second tapping was commenced. 



* .Ilcveas, ToBAGu. 



Tapping operations were only conducted for three hours per 

 day, as the laborers lived some distance from the estate. The 

 total cost of collecting and curing the rubber, on this account. 



An Eleven-Ye.ar-Old Castilloa Tree, Tubago. 



The department is alive to the possibility tha almost any latex 

 giver may turn out to be a rubber producer. Hence, everything 

 is tested. As a matter of record Mr. Collen's tests of such trees 

 as the bread fruit are apropos. The latices from the following 

 trees were experimented on : 



Good Luck- Tree — Thcictia ncrii folia. 



Bread Fruit — Artocarpus iiicisa. 



Bread-nut — Brosimum Alicaslrum. 



Frangipani — Plumeria alba and P. rubra. 



Hedge cactus — Euphorbia canariettsis. 



With the exception of the products obtained from the Bread- 

 nut and Bread Fruit latices the results are disappointing and of 

 little or no value. The former would be useful for making chew- 

 ing gum, but the cost of collection on a systematic scale would 

 . probably prove prohibitive. 



I want to add as a postscript that there was a man in Trinidad 

 (Jacobson by name) who is one of the most expert and artistic 

 photographers in existence. He gave me most of my best photo- 

 graphs, and incidentally, I told him that any that I used I should 

 tag "Jacobson Photographs." But Professor Carmody, Mr. Col- 

 lens and many others also furnished me with fine photographs- 

 and I took some myself and they all got mixed. If, therefore, any 

 reader sees a particularly striking picture in any of these articles, 

 let him imagine that it bears the proper credit "By Jacobson." 

 {To be continued.) 



