NINTH ORDINARY MEETING. 85 
The units.encountered in electrical science are the most complex 
of all ; and the labours of scientific men in overcoming them have 
had an indirect effect in advancing the methods of elementary caleu- 
lation. It is, however, only the notation for the principal units P 
and Q in terms of L, M, T that is complex. Given P and Q the 
notation for the remaining units is simple enough. Of the two 
units of electric quantity the notation for the electrostatic unit is 
the same as that for the unit of magnetic pole, while the notation 
for the electromagnetic unit involves that for the magnetic pole. 
General symbols for a unit such as M and V are of great service 
in elementary calculations apart from the use in a notation for 
derived units. The chemist is always using the phrases ‘ part by 
weight,’ and ‘part by volume;’ these ideas are expressed by M 
and V. 
NOTATION FOR GENERAL UNITS. 
I.—Geometrical. 
QUANTITY. NoraTIon. DIMENSIONS. 
IL@RYGHN 2 SAO ea LB Fe teas SEER: © cc Se Te Cae ere eC 
SIWHEOS: 6 guy pes eaoene Nea y ML Sips. caeweewero sis sa) < Magee ioe Ie 
MaltIMe enc stentas. «hc nubyelealoyelin Vi Beers tsa at sich oe sveie vor. « If 
JNITISE Se Saco eee yarchpermoradis) esse «oy cser- eco ce ite 
SIG BE aioe ene eoee roppositesper Upalon gies ssc ae sector Ih 
(Gnmyabure =. sc «see Radiamapers, §. Ritvycse ace oso veces a 
Il.—K inematicai. 
SIN OM Santis acts « Se AL oats! ateimmm - 2255 (0 chee ses aene Re Ree t 
WKELOGIEV ayes ys oo area 3 ef ese ae SM, «|= ca eRe ORO ieee Kita 
PXCCEletApIOUM ye eee Vl peLtapetel Bibel neo seisecy. omer tae 
Anonlar Velocity ..... Iare per Liradigs per T ...,;.......-:54- tm 
III.— Dynamical. 
PVIASS toes sisecsya ra ioe oh Sere LU oA SR OS - 6S Sea a ae RA SI Se Se m 
PRETISE DY ess es also) UGE SO. ¢ s eeee tec honeaen oe zl oe 
Mass-vector ..22.... 5. INI ales ios 2: MRE 2 ost oes Ronee eteerare at ee m1 
Momentum) 25.2.0... 2. MII mere eure oie, cra\eilessseraisiereahctet volar ml1t—! 
HONGO Micres atcis-cy= Pee Mab yelper peEMhweR) A.:53 sa. necbes sits OG 
SESS UE Cr sii escrow eee CTE S cas ste cs MR sled os ai ose atts ere. sar ran i 
\WGELES, So peeneeieeonieees Mebyeliper st: perm by ly (Ws ea ola: m |? t—-? 
PAIGUIVIEY)< ccfs) os oe. + = Vis DOR are: .+- BREE: fe ret oe.) “al ssodereey velaler’s m |? t-% 
IV.—Thermal. 
Memperature <......:.. ©) de no GED < 6.0 BORSA aneacran oer 0 
Siberia eer ee ML. a iMvotewater bytessi ss 5 ek eA m.4 
Thermal capacity ...... IMeof water by l@sper Mi Sos. .g7e ee 6 
