New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1895-06-23

and the disturbance or difference in resistance, IS
registered the dial OF the indicator by It's pointer
a disturbance. which is measured and registered on
the dial Of the Indicator, and as that change OF the
telescopes position bears known geometrcal rela-
ton the range OF the target it will be seen how
the distance Of the TARGET from the ship L. exactly
81 S ana h Ss nicely
adjusted. The diagram shown herewith vii. ex-
plain in a the principal points Of the sys-
The telescope on the rear range-fnder at A in
eeseope on the forward at b. The
distance between A and B Is known accurately its
The snS Is by @
the two range finders. The triangle formed by the
cu.ation. Three are needed to operate the
apparatus. at each telescope and one at the
Indicator
GREAT ACCURACY ATTAINED.
The range-hnders In letter written by Captain
J. G. Watson, United States Navy were declared
to have satisfactorily fulfilled the purposes for
which they were intended" the average error per
1000 yards during number of rigid tests being
Sn 10 He ADDED that the n r
hands OF three apprentice boys" The apparatus
the tests referred to by Captain Watson having been
made oh nf AssSp s San is its vune
ability and the consequent likelihood OF ts being
Fiske stadmeter was invented. In fact, the sadi-
meter is an adjunct TO the rdnge-fnder, and Is de.
signed TO be used with IL, In such way as to COM
bine the portability and convenience OF one-oo-
server instrument with the accuracy of .wo-ob-
server Instrument. II Is modification of the SEX
tant and Is OF the same size as the ordinary SEX
tant used in ships. When It Is employed In con-
nection with the range finder in naval battle tho
very carefully before the action has become hot,
bringing her as nearly abeam as convenient and
when distant say $500 5000 yards. The mast
head heigh. is found simultaneously with the stadi-
meter, and the stadimeter set at this height and
kept ready for use II afterward the range-fnder
becomes disabled. or If II cannot be used for any
reason. proceed With the stadimeter."
WHAT is CLAIMED FOR 1T.
The advantages claimed for the Flske range
finder that its construction Is of the simplest
character; 1t has no mirrors to become obscured by
fog or moisture; IL cannot be put out OF order by
any ordinary shock; 1t is unaffected by the
cussion OF guns: II involves In use no mathemati-
cal work computation whatever: II requires
practice or skill for its anprla,!cn; it's percent
age Of inaccuracy Is less than that due 10 the
known variations in the performance Of guns and
explosives. and its ndica tons instantaneous and
constant. for the men at the telescopes keep the
target constantly In view and the observer. watch
ing the indicator dial. may read the range at any
moment. and often as he pleases
The Fiske postiOn-inder, an apparatus designed
ence to land fertilization, will have a final test
at Fort Hamilton this week. BY its aid the posi-
ton as well as the range of an enemy can he de-
termincd In other words. gun can be adjusted.
not only 10 throw It's projectile over the proper
distance but trained exactly line with the target
be concentrated upon an attacking vessel The In.
vention. in connection with disappearing gun-car-
riages and the modern form OF land batteries, 10
obviously OF great importance.