382& বিদ্যুৎ-তত্ত্ব শিক্ষক MILE, Nauticl or geographical - 6080.204 feet. MILLI. A prefix denoting the thousandth part. MONTH. The anomalistic month--time of revolution of moon from one perigee to another = 27-5646o days. • The nottical month = draconitic month = time ol “re volution- trom a node to the same node again = 27.21222 days. The sidercal month”— the time of revolution referred to the stars = 27' 2166 days (n) can value) but varies by about three hours on account of the eccentricity t of the orbit and “peturbations.” The synodic month = the revolution form one new moon to another - 29° 5306 days (in ean value). = the ordinary moutli. It varies by about 13 hours. OH M. Uuit os elcctrical resistance. 1 he inter national ohm is based upon the olim equal to io" units of resistance of the C. G. S. system of electromagnetic units and “is respresented by the resistance offered to an unvarying electric current by a | column ol mercury, at the temparature of melting jce, I4°4521 grams in mass, of a constant cross section and of the length of Io9'3 centimeters.”= row E.M.U. = 1/9x Io-** E.S.U.
- International ohm = 1 o 1367 B. A. ohms = 1·o6292.
Siemens’ ohms. o B.A. ohm =o 98651 international ohms. Siemens' ohm = o'94o8o international ohms. PENTANE CANDLE. Photometric standard. r=22/7= ratio of the circumferonce of a cricle to its diameter = 3’ I4159265359. e е че POUNDAL. The British unit of force. The force which will ın one second impart a velocity of one foot per second to a mass of one pound.
