Lectures
Perth, Australia Occidental, 1951  1952
SERGE RAYNAUD de la FERRIÈRE
THE UNIVERSAL GREAT BROTHERHOOD WESTERN AUSTRALIAN SECTOR 
CREMORNE HALL. FRIDAY, 19^{TH} OCTOBER, 1951. LESSON: MISS P.NAGEL 
 SIDERIAL TIME 
(THE BASIS OF CORRECTION FOR HOUR OF THE DAY)
The above chart depicts the Siderial Clock in relation to the Zodiac, hours being 1 – 24. (Note. There is no A.M. or P.M. in Siderial Time) . We work from Siderial^{1} noon to Siderial Noon.
The Zodiac being 360 degrees, divide the 24 hours into 360 degrees and it equals 15 degrees. Therefore, if 1 hour equals 15 degrees, each sing being 30 deg. equals 2 hours.
At the moment that our Sun is Long 0 it is 12 noon and at the moment the Sun is 0 of Aries it is Siderial Noon. As illustrated in the above chart the Sun in relation to our Earth is at Long 0 and in relation to the Zodiac is Aries 0. Therefore we have Solar Noon and Siderial Noon at the identical moment.
(Cont’d overleaf)
Note: If Students cut out these two illustrations they can be used as demonstrated by Miss Nagel, to show how the Sun in its movement round the Zodiac is always 4 mins., or 1 degree ahead of the Earth in relation to their respective positions in the Zodiac.
THE BASIS FOR CORRECTION FOR HOUR OF THE DAY (Cont´d).
However, because of the tilt of our Earth on its axis, as it revolves around the Sun is loses 1 deg in 24 hours and also 4 mins in 24 hours, or, using our Astrological terms, the Sun gains 1 deg. in 24 hours and also 4 mins. in 24 hours.
Therefore 4 mins in 24 hours equals 1/6th. min or 10 seconds in 1 hour.
Consequently, when charting the Heavens for any hour of the day the Basis of Correction for Hour of the Day is as follows:
(a). Add time elapsed since previous noon.
(b). “ 10 seconds for each hour elapsed since noon.
Example 1. Siderial Time for London, 18th.October 1951. – 10 p.m.
Referring to Raphael´s Ephemeris, Siderial Time for previous noon which is 12 noon 18^{th}. October) is 
13 hrs. 44 mins. 40 secs. 
Add time elapsed since noon 
10 0 0 
“ 10 seconds for each hr. elapsed since noon. 
1 40 
Required Siderial Time = 
23 46 20 
Nearest S. T. (London) 
23 45 19 
Error 
1 1 
Example 2. Siderial Time for London 11^{th}. January. 1951 – 7 a.m
S.T. previous noon (which is 10^{th}. Jan) 
19 hrs. 16 mins. 48 secs. 
Add time elapsed since noon 
19 0 0 
“ 10 secs for each hr. elapsed since noon. 
3 10 
Required Siderial Time = 
38 19 58 
(Minus 24 hrs) = 
14 19 58

Nearest S. T. (London) 
14 18 37 
Error = 
1 21 
***
STUDY: FIND SIDERIAL TIME FOR LONDON 2nd. NOVEMBER, 8 a.m.
1N.E: Existe un error en el original. Por el contexto de la conferencia se trata de “Solar noon”: medio día solar (Referirse al final del tercer párrafo)