9

Illuminating Apparatus, Etc.—Continued.
93. How are the flashed produced—By the whole apparatus revolving ______; by revolving belt only _______; if by panels of vertical elements revolving outside of fixed lens, state the number of such panels: ________________________________________________
Describe how: ___________________________________________________________
94. If by vertical elements, (a) state the number in each panel, _______; (b) and the number of elements of fixed lens covered by the panel: _________________________________
95. If light is occulting, state (a) the characteristic, __________________________________
(b) Between what time limits may characteristic be varied without structural changes in mechanism, ______________________________________________________________
(c) Are eclipses produced by sleeve, revolving screens, or valve (if gaslight), _________
(d) Size of sleeve and amplitude of movement, ________________________________
(e) Axis of rotation of screens, horizontal or vertical, _______; (f) relation of axis to vertical axis of illuminating apparatus, _________________________________________
Screens: (g) Do they revolve as parts, or independently, of illuminating apparatus, ______
(h) If about vertical axis, how many in circumference, __________ ; (i) time required for complete revolution, ; (j) form, _______________________________________________;
(k) how mounted (see Questions 101-109), ____________________________________
(l) if actuated by standard clockwork, state order, ______________________________
(m) date made, __________________________________________________________
If occultation is effected by valve (n) state name of maker, __________________________
(o) pattern, _____________________________________________________________
(p) does it operate reliably, _________________________________________________
96. Pedestal, Cast iron