56 
Some Account of a New Beam. 
A yellow veined stone from the Lins formation in Rewa and Bundelkhand promis- 
es fair, being clearer coloured, and the veins not so shaded as to obscure the surface. 
It is, however, considered too soft for general purposes, though from the extent of 
the formation in which the stone is found, it is probable more compact specimens 
might be procured. Most of the stones which have undergone experiment, it must 
be premised, are pieces picked up in the haste of travelling, and without any 
opportunity of ascertaining by further search whether they were fair specimens of 
the several kinds- 
The hist received, was a small piece of a limestone slate (if it may be so termed) 
too small to determine its properties by actual experiment, but from the purity of 
its texture, and general appearance, there is no hesitation in pronouncing it well 
suited for lithographic purposes, provided it can be procured of a sufficiently clear 
colour, for when ground with sand and left unpolished the surface is of a tolerable 
white: it would be desirable to procure a slab of this stone sufficiently large to make 
fair trial of its capabilities. 
While on the subject it may be permitted to be stated, that the experiments were 
made upon very small pieces of the respective kinds, and that the favourable results 
from such imperfect materials warrant us in expecting better success when speci- 
mens shall have been obtained. 
A China stone of a light green colour, ponderous, compact, close grained, and 
effervescing strongly with acids, was also found to be well suited for chalk, drawings ; 
in fact, preferable to any of the foregoing, and little inferior to the best lithogra- 
phic stone in this respect. For writing it is unsuited, taking but an indifferent 
polish. 
If these experiments are repeated by those who have leisure to devote t > the 
purpose, and who reside in the very habitat of the rocks themselves, we expect the 
inconvenience and heavy expense of importing stones from England or France 
will be avoided, and the amateur thus be enabled to draw his resources from his own 
immediate neighbourhood. 
Since writing the above, letters have been received from which the following 
are extracts ; they contain some further particulars which will be interesting to the 
lithographic reader. ® 
. “ 1 hare packed you up a block oF yellow limestone,* very highly polished on one 
side, one toot long, eight inches wide, and two and a quarter inches thick. I am con- 
Vinced from the polish it takes, that it may be made very useful in printing transfers 
or line drawings of any kind. I havealso put np abrick made of Knrundnm and Lie, 
and 1 think its application in grinding the surfaces of the stones would lie very use- 
tul ; or when two stones are not ready, any one may be made readv for printing with 
tills brick, or rather with a series ; and as they may be made to cut to any de uce 
of coarseness, so they would he particularly useful in preparing the different parts 
St ™ e for cha , !k drawin S s - is 1Ilade ranker (as a carpenter would 
call it) by putting more koruiidum into it, and the last rubber used before the 
pohshing material (.alcined tin, wet and applied through a fine linen rag) is used 
' « p " re s 16 . '*?• A S' 10 ' 1 quantity of water makes the rubber work better.” 
ib» “ JU5t re ‘i c "'ed your note of the 1 2th, and have every reason to believe, that 
wS'ir' 1 "" may lie procured in slabs large enough for ordinary purposes. 
f * thout s«y directions as to size, J have had it brought to me in slabs a 
foot square ; and l dare say that with care in taking it up, much larger migilt be 
obtained, lhe best comes. 1 believe, from a nullah in the Pergunnah of Jettasan- 
kei, near a place called Deori C aakardha, about 2$ Coss N. W7 from Hatta." 
IV. Some Account of a new invented Beam, proposed as an economic* means of 
working Pumps or communicating similar alternate Mn . mi. 7 
simplf oumn i l a * PhiI ° SOphy \ V ° l IL there is a description given of a very 
author S- "\ whl . ch there , are nnne b . llt valves anil scarcely an v friction The 
autnor state,, that m a machine working two of these immns Ctl ? , 1 6 
with alternating motion, an old and feeble man weighing 1 iToound^t °i % be f m 
feet of water lit f ee t per minute, working 8 to 10 hours nerd v A ? 7 CU ' ,lC 
man loaded with 30 lbs. managed »*, an* this without faTigtl' Ae manner^ 
* From Jysulmer, the Sung Khattoo of the natives. 
