Barns often struck by lightning. 343 
my object for introducing this topic now is, more particularly 
to state, that the phosphorus was ignited, on one occasion, 
at the distance of twenty-two feet, notwithstanding the inter- 
position of a large pane of glass, twenty inches square. This 
shows, that glass is ey oe by radiant heat from very 
hot bodies. I had my band on a lever, to which the pane 
was attached in spe to raise it; but I had not time to get 
it under way. For this SREP, the phosphorus was 
melted on cotton, at the bottom of a tube, and the cotton 
afterwards divided, under water, into pieces of a proper size. 
Being placed ina ‘eandle wick, the candle may be lighted 
oe the mirporay which is a very pretty result. 
es Construction of Galvanic: Aj ppa 
eneed Professor Hare’s Memoir in the seeaitl velaniey 
ae 
lam constructing a galvanic apparatus, in a glass jar, two 
and a half inches in diameter, by eight inches in height, of 
coils of copper and zinc; the zinc “plates are about nine 
inches by six, and are rolled up with the copper by means 
of a mandrel, and two pieces of soal leather interposed, one 
ene of an a. ingh thick, the oe ee on the i insi de 
ry, if / ther 1s Use ny ae ) : . 
sea is, of course, Saenee when ee s taken 
mandrel, Narrow pieces of wood are employed to "keep 
them apart afterwards. 
es ara os pti ee bend this re song soaeceaee ct we have 
: estos atv fo te mesial os cto Ed 
Arr. Be Tabitiy of Barn to be aoe 6 
- tning.—Epiron. 
Tur fact, ee are aes more freaataly pot by 
ightnin than any other description of buildings, is notori- 
ous. Every summer presents a calamito us list of these 
buildings burnt in thunder storms; and it is no er uncom- 
mon occurrence, that several are consumed b the same 
thunder storm. Instances are at hand in sufficient numbers; 
‘but, as these occurrences are so feoquest, it is nott 
Foes IIl.....No. 2. 
