The sun., 1896-06-21
NOTES ON SCIENCE AND INDUSTRY T.

All that is the place for my hair"
NOTES ON SCIENCE AND INDUSTRY.
Tho servtceabieness OF asphalt in reservoir con.
sruction and Improvement is illustrated. according
to accounts published in Denver. Col. papers, In
the OF two largo distributing reservoirs in that
city. each twenty ak feet deep to the flow line.
For OF these reservoirs mixture consisting OF
go per cent. Trinidad asphalt and 80 per sand
was adopted, being laid over at a temperature OF
$50 more. and was held on tho slopes by rows
OF anchor spikes the thickness was an inch and
three quarters and tho sheet suitably finished
by means OF smoothing irons heated 10 a cherry
red, the surface proving very glossy. In the other
the reservoir lined with California asphalt
that is twenty parts OF asphalt to eighty OF sand,
the mixture being compressed by simple roller
made OF castron pipe. kept hot by a hanging nre
basket inside The tightening effected was complete.
The name OF Paul Brand has somewhat suddenly
become famous In Berlin as the inventor OF new
army rife. which has been patented in all coun-
tries ami the manufacture OF which In great guam
titles Is being begun. 1t differs In Its
structIon from all other guns in having provi.
sion for the irng Of ds"harSe that service being
caused by the sudden expansion OF compressed gas.
and among the chief advantages named for tho
gun are the trihing heat generated In the barrel.
the absolute absence OF smoke. and t'e impossible
Try ot dross hetng formed In the gun The
tridgcs OF entirely different construction from
ordinary. The reservoir carried with the gun
tain- quantity Of compressed gas sufficient for
$500 discharges. The force OF a shot surpasses
49,, ,.,, ,,. 49,, ,, c,,, 49,, .. =, ,,,
o, ,,,,nor, I,,.-r,r,,,n r,o ,.,.,,.,, =,
,n,, ,.,,hIr ,,o h,r-o, ,r,or,,s % n an ,h,, st..
equivalent to the amour, Of heat occasioned by
the friction Of the bali alone when forced through
the barrel.
III o'''nss'ne IN 'he Journal " me trh"f"" insf'-
f"'e "hAt he terms the reversal "' Invention. MI
- T. 'h"'hpsoh ch"'s'S "S pe''neh' '''u'''a""h
inc present air ofAke system as recognized re
''r"a' OF tAe early type though long time passed
pe'"re 'he chahse TOOK pace' Inc principle had not
been usea US khh OF TOOL ah' therefore, the idea
OF 'he ne" otaAe oil" not come oy demand OF the
i'ihu' pu' by combination OF circumstance that
i 10 say Hcc'eh'a''S' ot these Two systems OF
"'HNo' VI" "''' "p''a'es I" s'"P Il tram ny 'he posi-
i've A'u"h OF c"mpressea mir against the wheels
'Hfoush 'he heai"fh OF inc hsua' prake Shoes and
the second by the nesatiT" action OF compressed
ar "hich normally ho'as the shoes away from
the wheels In opposition 10 spring The adVan
are apparent AS soon as compared concerning their
main object, safety. Tor by the former the train
cannot DE stopper IN the case OF Q leak or disor
deFed pump "hic Win the latter the train stands
SIN as soon as the air leaks out or the pumps re
,,o oo,o,,o.,,. -, ,... ., ,,,,,
-, -, W ''' " " ,' ''".'' s'..''''',n
ur,h I,,,o -, po,,uL u ., 49,, -
80, ,.,, =, 49, -, :" 'n'' ""
-, ~ ~ "
-, 81, -, . -. -, -
, 80. 49,, 80, ,, " v" ''''
, - -, .'''. 'o' , ~ ~
" ~ " ' ' =" ''"''
= -, " ' $50
:, ,,a -. -, a.. ,, 90
- - 49, ~ 49, '''e ''s = '''.l -''' ''''
- -, .oras.,.. -, ''"1 y. NV" 10
-, ~
by means OF screws, the adjustment being en-.
ployed 10 force the rolls against ia. caleuderlbR
roll at any pressure required There are three tight
pulIeys. having diameters respectively protor.
toned to tho speed demanded OF tho several cylin
ders; tho second and third pulIeys are mounted
upon opposite sides OF the frame on the extensions
OF the shafts and the cylinders are set one in front
OF the other In such a manner that the cylinder
furthest from the delivery roll Will have the great
est speed. framework attached TO the main
frame and secured to tho floor receives the roll OF
material and delivers It to the caenderIng cylinder
Tho basis on which the assertion has been made
that gun Is Of several million horse power is CT.
planned by the California Scientific fress The 90.
ton gun with u $50 pound charge OF powder, throws
a projcctlc weighing 1920 pounds at an initial We.
locity OF ,Tl5 feet per second. thus communicnt.
Ing TO II a live power kinetIc force of g2 5y7.
900 foot pounds. The thrust eXerted by the gases
due to the ignition OF the powder lasts less than tho
hundredth OF n second, tho result being that dur.
ing the active period Of the work OF the powder In
foot pounds Der hundredth OF a second say x 7oo
,oo nno Zoo, nou,ds nor s,co,a and ,,,s ,.,.,,n,