1832-3 Modes of obtaining Important Results, Sfc. 195 



above alluded to, we ascend by a small patch of grey limestone, and 

 set foot on the clay slate of Landour*. 



It is of a faded red colour, frequently passing into black, bluish 

 black, greenish grey, and light brown, disposed in large slates, inclining 

 at a considerable angle in an easterly direction ; it is occasionally waved 

 in its structure, and in the red varieties cleaves easily in the parallel 

 of the stratum, presenting a glittering surface, owing to small particles 

 of imbedded mica. The black and bluish black varieties do not 

 yield so readily to the hammer ; they are tough, afford irregular frag- 

 ments, and cannot be adaptpd to the purposes of roofing. The accident- 

 al rocks which occur in this formation may be thus enumerated : granu- 

 lar quartz rock+ ; felspar t ; flinty slate and limestone §. 



They are all unconformable, crossing the clay slate at right angles, 

 and dipping to the north. 



Abstract of a Thermometrical Register kept at Landour from the 1st of January 

 to the '2>\st Dec. 1331. Thermometer kept in an open verandah facing the N. 

 Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sept. Oct. Nov. Dec. 

 Max. 47° 48° 64° 76° 85° 86° 70° 72° 69° 70° 62° 50° 

 Min. 31 31 40 44 60 60 fil 59 54 51 42 30 



V. — On Modes of obtaining Important Results by Simple Means. 



By Capt. G. Twemlow, Bombay Artillery. 



[Continued from page 70.] 



2. — Easy mode of casting masses of simple metals without the aid of furnaces. 



The native mode is to surround the mould (sunk in the earth) by 

 a fire capable of keeping it hot, then to employ as many assistants with 

 their small earthen pans, and hand-bellows, as may be necessary to fuse 

 the requisite quantity of metal ; in this way it would not be difficult to 

 cast a pillar of large dimensions, taking the precaution to have the mould 

 strong, well bound and supported, the fire around it sufficiently intense, 

 although properly covered in, and the assistants in sufficient numbers 

 to melt the metal, and pour it into the mould, kept hot as long as requir- 



* Landour is separated from the snowy range by intermediate zones ; they all 

 run parallel. 



f Concretions not exceeding the size of a pigeon's egg, and of a milky hue, 

 as seen on the site of the new Hospital. 



X Compact felspar of a greyish colour, distinctly stratified, slaty in the 

 small, and by the aid of a glass small acicular crystals of hornblende may be 

 sometimes discerned ; — cleared site near Mr. J. Lloyd's grass hut. 



§ But sparingly found of a pink colour, coarse in structure, and rather tough ; 

 — site of the tennis court. 



c c 2 



