1834.] On the Preservation of Sheet Iron from Rust. 270 



monsoon, which begins about the end of October, the weather is 

 settled and fine, with heavy dews before sunrise. 



Range of the Thermometer, ^c, in 1816. 



Months. 



Januaty, 



February, 



March, 



April, 



May, 



June, 



July, 



A ugust, 



Sept., 



October, 



Nov., 



Beer., 



Mean, 



25 - 

 S si 



540 



58 



69.5 



66 



66.5 



65.2 



64.5 



62.5 



62.2 



64.5 



61,5 



57 



61.7 



84" 



91 

 100 

 100 

 100.5 



90.5 



82 



85.5 



89 



88.5 



82.5 



85 



89.8 



30 



30 



43.5 



34 



34 



25.2 



17.5 



23 



26.7 



24 



21 



28 



28.1 



74 



79.7 



83 



83.5 



77.7 



73.2 



74 



75.5 



76.5 



72 



71 



75.7 



^ S c 



s 

 ••3 





Proportion of 



nthly 



ince 

 ual m 



it 

 O, 



s 



winds. 



0 s: s 



> 















1 



n.e. 



s. w. 



var. 



0 



incfi. 



incn. 









0.7 





U 



30 



1 



0 



-1.7 



1 ft 1 7 



U.oU 



24 



5 



0 



-1-4.0 



15.05 



0.01 



12 



17 



2 



-j-7.3 



M.52 



2.47 



4 



26 



0 



f 7.8 



15.00 



6.46 



3 



28 



0 



+2.0 



9.27 



6.85 





29 



0 



—2 5 



6.60 



1.86 



0 



31 



0 



-1.7 



8.77 



1.37 



0 



31 



0 



—0.2 



9.36 



0.80 



0 



30 



0 



+0.8 



9.30 



4.07 



17 



13 



1 



—8.7 



7.35 



1.51 



26 



4 



0 



—4.7 



8.92 



0 



28 



3 



0 





128.12 



23.7 



145 



218 





Range of the Barometer, in 1826. 



Months. 



Mean Height of the Barometer at 





4 A. M. 



10 A. M. 



4 P. M. 



January, 



27.715 



27.763 



27.677 



February, 



.648 



.687 



.608 



March, 



.638 



.664 



.571 



April, 



.569 



.614 



.499 



May, 



.639 



.659 



.478 



June, 



.498 



.509 



.458 



July, 



.498 



.607 



.471 



August, 



.502 



.514 



.470 



Septr, 



.636 



.545 



.483 



October, 



.592 



.621 



.634 



November, 



.588 



.630 



.559 



December, 



,616 



,650 



.663 



Mean, 



27.678 



27.605 



27.531 



0.074 



V. — Experiments on the Preservation of Sheet Iron from Rust 



in India. By James Prineep, Sec. &c. 

 (Extracted frotn the Journal of the Asiatic Society of Bengal ) 

 The proposed extensive employment of iron steam boats tor the 

 navigatioB of the Ganges, rendered it a desideratum to asceitain 



