xviii Proceedings. 
Great changes were observed both in the horizontal and verti- 
cal faces. The vibration of the face read to amounts to over 
2 degrees declination at Greenwich. At Potsdam vibrations 
of over 3 degrees were observed. A brilliant aurora was 
observed at Greenwich on the 14th. 
It was moved to defer action on the proposed amendment to 
the By-laws until the next regular meeting. 
Apri 4TH, 1892. 
President Pritchett in the chair with 40 members and 120 
visitors present. 
The regular order of business was dispensed with, and 
Prof. Nipher gave a lecture on the ‘* Modern Dynamo,”’ 
which lecture was fully illustrated with stereopticon views and 
laboratory experiments. 
Aprit 18TH, 1892. 
President Pritchett in the chair, 16 members present. Pro- 
fessor Holden presented to the Academy a photograph of a 
drawing by Prof. Weinek of the Lunar Crater Petavius. 
Dr. Todd gave a description of the dentition of the elephant. 
The growth of the teeth was fully explained and illustrated 
with skulls and teeth. 
The question of the Amendment to Article 15 of the By- 
laws was brought up for discussion and an amendment offered 
so that it would read ‘* Active members shall pay an initiation 
fee of $5.00 in addition to which resident members shall pay 
annual dues of $6.00, and non-resident members shall pay 
dues of $2.00.’ 
This was referred to the Council for their consideration. 
Prof. Pritchett reported that the Council looked favorably 
| — the formation of an —— mechiont: 
