Proceedings. xxi 
Prof. Nipher presented a communication on Phenomena of 
Four Phase Currents. He showed the characteristic features 
of poly-phased currents. The currents were collected from 
four equidistant points. in the armature of a Gramme gener- 
ator, and were sent into four symmetrical coils on a large ring 
of wrought iron wire. A glass plate above the ring was 
sprinkled with iron powder. The iron particles adhered in 
small masses, which rotated witb the traveling pole near the 
center of the plate. The filings just over the iron ring swept 
around the plate in an opposite direction from that of the 
motion of the polarity, due to rotation around horizontal axes 
converging in the axis of the iron ring. As the pole ap- 
proaches a heap of iron powder it begins to adhere in fila- 
ments which quickly rise and stand vertically when the pole 
is beneath. As the pole passes on they lie down in an 
opposite direction. The result is a spinning, heels-over-head 
tumbling of the particles takes place, and all sweep around in 
a direction opposite from that of the traveling polarity. 
Dr. G. N. Bock presented a paper on ** Modes of Burial 
used by the Ancient Mayas of Guatemala.’’? Dr. Bock’s 
paper was fully illustrated with numerous photographs, 
pottery and stone images and utensils. 
Article 15 of the By-laws was amended so that it would 
read ‘* Resident active members shall pay an initiation fee of 
$5.00, and annual dues of $6.00, payable at the beginning of 
each year. Non-resident’ active members shall pay an initia- 
tion fee of $5.00, and annual dues of one-half the dues for 
Resident active members, payable at the beginning of each 
year.’ 
Dr. Sander was instructed to invest $1,000.00 of the funds 
of the Academy. 
OcrosBer 17th, 1892. 
President Pritchett in the chair, and thirty members and 
ten visitors present. 
The Corresponding Secretary presented a letter from Mr. 
Henry B. King, in which he mentioned that he had in he: 
possession a number of survey notes collected by his father, 
