COAST. I ARTILLERY JOURNAL, - Air Defense Artillery

PROFESSIO:\AL i\OTES 479
It was necessary to impro\"i,e a range ,cale, as the one on the drum would not
re,pond. One was drawn, blueprinted and pasted on the drum, and has given
efficient service. Six telephones were installed, two to each observing instrument
and a gun data phone at the gun. One time-interval bell only was installed in a
box on the outside of the house covering the gun as it can be heard at both
B"
obsen-ing stations as well as by the gun crew. On account of the limited number
of observing instruments and telephone, available, the observers do the spotting.
Separate stations for spotting w~uld be better if materiel permitted. The mechanical
work neces,ary to mount the gun was done by Captain Ernest L. Lucas,
Ordnance-Resen-e, a professor of mechanical engineering at this institution, who
helped in every possible way. Care wa, taken in setting up the mount for the
depression position finder u,ed a, the gun carriage to orient its azimuth circle