F 14
A duplicate valve, consisting of four glass jars with lead electrodes, in place of iron jars (which served also as electrodes), was constructed by Messrs. Jeffries and Evans in the month of July. With the new ammonium phosphate this valve has worked well, so far. Either valve may be brought into use by means of a four pole two-way switch fitted on a subsidiary charging board which is used for charging an electric hand lamp through a shunt across the main D.C. charging circuit. The necessary reduction of current is obtained by placing three electric light bulbs in the shunt circuit.
Time Signals by Wireless Telegraphy.—After consultation with the Astronomer Royal the following apparatus was ordered for receiving time signals by wireless telegraphy :-
1 tuner (Admiralty pattern)
1 crystal detector and rheostat (Sullivan pattern)
2 highest grade telephone receivers (Sullivan pattern) of
2,000 ohms resistance.
The choice of a relay, or amplifier, has been left open until the results of experiments with two new types, recently placed on the market, are made known.
It is anticipated that masts 100 feet high will be required for the aerial in order to obtain time signals from Shanghai; but masts 75 feet high will probably suffice to receive time signals from the Pulien and Manila Observatories.
Apparatus for distributing time signals has recently been ordered from Messrs. L. Leroy & Cie, Paris.
VIII. MISCELLANEOUS.
Staff—Miss A. Doberck, Assistant Meteorologist, resigned on February 22, on account of ill health. The post has been abolished and a 3rd Grade Clerical Assistant substituted. To this office Badan Singh was appointed on March 15, on one year's probation. During the absence on leave of the Director, from February 25 to November 16, Mr. C. W. Jeffries, the Chief Assistant, acted as Director and Mr. B. D. Evans, the First Assistant, acted as Chief Assistant.
The European Staff acted as cable censors as follows:—
Director, 4 hours daily from January 1 to February 22.
Chief Assistant, 4 hours daily from January 1 to May 31,
and October 28 to December 31.
2 hours daily from June 1 to July 31.
First Assistant, 4 hours daily from January 1 to May 31,
and August 1 to December 31.
2 hours daily from June 1 to July 31.
F 14
A duplicate valve, consisting of four glass jars with lead elec- trodes, in place of iron jars (which served also as electrodes), was constructed by Messrs. Jeffries and Evans in the month of July. With the new ammonium phosphate this valve has worked well, so far. Either valve may be brought into use by means of a four pole two-way switch fitted on a subsidiary charging board which is used for charging an electric hand lamp through a shunt across the main D.C. charging circuit. The necessary reduction of current is obtain- ed by placing three electric light bulbs in the shunt circuit.
Time Signals by Wireless Telegraphy.-After consultation with the Astronomer Royal the following apparatus was ordered for receiving time signals by wireless telegraphy :-
1 tuner (Admiralty pattern)
I crystal detector and rheostat (Sullivan pattern)
2 highest grade telephone receivers (Sullivan pattern) of
2,000 ohms resistance.
The choice of a relay, or amplifier, has been left open until the results of experiments with two new types, recently placed on the market, are made known.
It is anticipated that masts 100 feet high will be required for the aerial in order to obtain time signals from Shanghai; but masts 75 feet high will probably suffice to receive time signals from the Phulien and Mauila Observatories.
Apparatus for distributing time signals has recently been ordered from Messrs. L. Leroy & Cie, Paris.
VIII. MISCELLANEOUS.
Staff-Miss A. Doberck, Assistant Meteorologist, resigned on February 22, on account of ill health. The post has been abolished and a 3rd Grade Clerical Assistant substituted. To this office Badan Singh was appointed on March 15. on one year's probation. During the absence on leave of the Director, from February 25 to November 16, Mr. C. W. Jeffries, the Chief Assistant, acted as Director and Mr. B. D. Evans, the First Assistant, acted as Chief Assistant.
The European Staff acted as cable censors as follows:-
Director, 4 hours daily from January 1 to February 22. Chief Assistant, 4 hours daily from January 1 to May 31,
and October 28 to December 31.
2 hours daily from June 1 to July 31.
First Assistant, 4 hours daily from January 1 to May 31,
and August 1 to December 31.
"
2 hours daily from June 1 to July 31.
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