378 BOTANICAL INQUIRENDA. 



hedge of the aloe Mysore thorn, or some such plant, will be re- 

 quired to prevent cattle from entering. 



17. The means of the men being limited, care should be taken 

 to avoid putting them to much expense, but the other extreme 

 of doing everything for them should be equally avoided. Their 

 labour at least should be required, Government defraying the 

 general expenses, as wells, laying out, &c, which occur only at 

 the outset. 



18. In the above suggestions, my object has been to make the 

 proposed gardens a source of gratification to the entire regiment, 

 as well as to the small section of it which may be fond of garden- 

 ing; and to avoid meddling with the men as much as possible, so 

 as to render it a place of ease and enjoyment for them after the 

 labours and restraints of their profession. It is difficult, in so 

 small a compass as a memorandum, to say much on the mode of 

 cultivation to be followed ; but the works I have referred to in 

 par. 13 will supply the necessary directions on this point. 



H. Cleghorn. 

 11th Sept. 1855. 



BOTANICAL INQUIRENDA. 



Extracted from the Admiralty Manual of Scientific Inquiry. 



India, Siam, Indian Archipelago, China, &c. 



Catechu. — Observe the processes by which the various kinds of 

 catechu, cutch, Terra japonica, and gambir are obtained ; and if 

 from trees, whether from others besides Acacia Catechu, Areca 

 Catechu, and Uncaria Gambir. We wish to identify the trees with 

 the respective extracts. 



Grass Oils. — The grasses used in India for affording the fragrant 

 essential oils, known as lemon-grass oil or essence of verbena, 

 ginger-grass oil, citronelle, &c, require investigation. "What, for 

 instance, is the source of the essential oil imported from Ceylon 

 as oil of lemon-grass ? It is considered quite distinct from citron- 

 elle, which is also a production of the island. 



