New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1876-10-21

dd continually nv others less and less distinct The
sound aud rumbnG OF the earth were az Ie both
together The observers with the Instruments pG.
record q very brief aud rapid rise 10 the ,na
the Instruments the record SHOWS ' cue tst the
time OF ascent was iDnpprecihble' Inc soilu d 90 a
gulshed from the rulnbng OF the eaII, ~ sion az n
dun roar such as comes from torpedo e4posion ~
distance Al Springfield Junction the noise Is SPOKEN oi
a. a low, rumbng sound, gradually increasing " ""N
mum and then diving away.
Cen Abbott said that he had never seen so quick an
explosion Within hS s1 Ryer tbrown np had reached
half its hight. Much discussion was eflle1 ~ ,in
NewtOn's paper. He himself exltesse9 i -
MIN tho iii scordant estimates II gave for the tlilsis
sion OF snnnd through the earth ne tugin2cu I'M
probably the rapid record given at Wllletts ROM MS
dun m the fact that tie space between there ana Ha
itt, Point was largely covered by the East River and
at tbe vibrations may have been more SWIFTLY carried
iy wafer During the discussion Prof O. y. Rood re-
fcrTed 10 Prof Mayors experiments az SOUTH
j. which gave for the vibrations from this explosion
ed of about 900 feet per second. PrOfs Henry
and Hgard and both the Profs Rogers joined IN the
discussion which took wide range, including the qnes-
zion as 10 whether there any for taking the
prrcauon of blowing of steam from boilers in the
vicinity beforehand. Prof Henry mentioned the curious
coincidence that the boiler OF the Lighthouse Boards
steamer sprung leak AZ the time Of the ialetts Point
explosions steam had been blown of just previously IL
was also mentioned in connection with the theories OF
vibration that nitrO-gycrne will tear gin-cOttOn 10
pieces If exploded upon II but Tie cotton does not eA
mode But if the converse experiment be tried the cx
poson of guncoton sets OF the ntro-sycerlne' Gun
cotton viii not explode gunpowdrr.
LAST SUMMERS HOI WEATHER.
Prof Elias Loomis gave account of some of his
studies Of the signal Service weathermaps Selecting
one Of the hot days of last summer-nO quite the hot
testhe ascertancd at each signal station how much the
heat there exceeded the mean Of that locality for that
month. He then placed the figures for this excess
against each aud drew curves through equal
excuses They gave n center around Denver
Col, ana the generally tapered OIL
along the northern aud southern boundaries of
the United States low barometer chart for the same
day and hour somewhat similar in it's results though
the curves did not very closely correspond During the
whole heated term" a low barometer was associated
with high temperature, large Of low barometer
succeeding another during that entire period, aud
always less concident with excess OF heat ON
the day particularly under observation the winds were
with few exceptions, from the southwest In the
whole supcrheated area on It's outskirts tne
wind was from the north. The excess OF neat
was about 2O OF this about 100 may he fairly attTb
utcd 10 southery winds bringing hot air from the morr
heated r. gons the south Of MS For the other lo
Prof. LOons proposed to account by the prevalence OF
extraordinary dryucss at the North-Nest-a region
usually dry indeed In Summer, but Ia tins instance sun
irred to unusual drOuh while soutlcry winds. sweep
iu over IT, kept back the north wind by which II Is old-
Manly visited nj intervals. Here stratum Of heated AR
was continually formed which supplied 10 the general
weather OF the country ten Gf the extra 2O' W. C. W.