534 Visit to the Pakchan River. [No. 139. 



A good specimen collected at Bokpyen, by two men in about twenty 

 minutes, weighed 2040 grains. The specimens marked by an asterisk 

 are sent in duplicate with this report. 



G. B. Tremenheere, Captain, 

 Maulmain, Sth April, 1843. Executive Engineer, 



Tenasserim Division. 



Memoir on the application of Asphaltic Mastic, to Flooring, Roofing, 

 and Hydraulic works in India. By Captain Goodwyn, Engineers. 

 With a plate. 



[This valuable memoir has already been lithographed, in which form many of our 

 readers may have perhaps seen it; but its importance in all points of view is so great, 

 that we have not hesitated to request permission from its talented author to insert it in 

 the Journal.— Eds.] 



At no period probably did there exist such an union of essential quali- 

 ties in the means of constructing as at present. Allusion is here made 

 to the value of the material employed, and the art of working and dis- 

 posing it, so that in all classes of erections, whether private or public, 

 there is an addition to personal comfort and convenience, combined 

 with permanency of structure at an economical original outlay, estima- 

 ted with reference to the least possible expence in subsequent main- 

 tenance. 



The following memoir, in connection with others having relation to 

 the improvements of the age, is drawn up with a view of introducing a 

 most valuable material to general notice, one worthy the patronage of 

 the Government, as well as the attention of the merchant, the planter, 

 and all connected with building of every description. A material which 

 has been extensively used with the most complete success on the con- 

 tinent for some years, and lately equally so in England. The excellent 

 qualities and varieties in the mode of its application have received the 

 approbation of the heads of our Engineer Corps now at home, Ge- 

 nerals McLeod and Tickell, and Colonels Hutchinson and Colvin, in con- 

 sequence of whose opinions I brought it to the notice of the Court, 

 and was by the Directors permitted to bring some to Calcutta to be 



