394 
thin split bamboo, some lalang spread cunningly over and around 
the pit, and a piece of jack fruit as bait, will probably do all that is 
wanted. 
I have caught three in four nights in this way, which is satisfactory 
as far as it goes ; but it is evident that very considerable damage 
might be caused to an estate, 'before they could be exterminated, 
even if extermination were possible. 
I beg to remain, 
Dear Sir, 
Yours faithfully, 
W. H. BARNARD. 
Acting Deputy Conservator of Forests , 
Perak. 
The Editor, Agricultural Bulletin, 
Singapore. 
IMPERIAL INSTITUTE. 
( South Kensington, London, S. W. ) 
REPORT ON FOUR SAMPLES OF BAT GUANO FROM 
THE FEDERATED MALAY STATES. 
BY 
Professor Wyndham R. Dunstan, m.a., f.r.s., Director. 
The first of these sapiples of bat guano was forwarded to the 
Imperial Institute by the Superintendent of the Botanical Gardens, 
Singapore, and is referred to in a letter dated the 1 8th March, 
1904, which states that it was obtained from the limestone caves at 
Padang Rengas in Perak, about 16 miles from Taiping. 
Subsequently three more samples of bat guano were sent to the 
Imperial Institute by the Superintendent of the Experimental 
Plantations of the Federated Malay States. These were described 
in a letter No. Ex. Pitns. 115/04, dated the 25th October, 1904, in 
which it was stated that they were collected in the Batu Caves at 
Selangor, Federated MaPy States, which occur in limestone rock 
at a height of about 300 feet above sea level, and, so far as is 
known, are frequented by bats but not by any other species of 
mammals or birds. 
It was desired that these samples of guano might be analysed 
and their commercial values determined. 
description of samples. 
Sample A, from limestone caves at Padang Rengas, sent by the 
Superintendent of the Botanical Gardens, Singapore. 
This sample weighed about 14 pounds, and consisted of small 
lumps mixed with powder; The colour was dark buff, but small 
