216 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1907. 
increase in output and fall in price which has marked the industrial 
development of the electrolytic process: 
Year. as ess er Year. HCaue, cee a 
. pound. : pound. 
Tons. Tons. 
ees at A ae eee ae 3.12 6000: || 1806s =e Sore Le ee eed 1,755.00 17.0 
1 SCH meee nears wane a 14.80 BOO NOI | 80 7s Bee ae ae eae 3,327.00 17.5 
QR 7 eeepmee ates Se Ey Sie 22.50 40050).|| :189Se=2 ee eee Bae 3,953.00 16.2 
ici! Sy Slee Ree ee eee 39.40 250.07) 1800" == ate te et eee) 5,459.00 16.2 
TESTS] ae a ee ee ee 85.20 DUAR OY) | | BIS OO ee ee 7,192.00 16.0 
TASS Se Ee ae a a 174.50 1002011 MOOI s tates Lvs LE Sete 7,420.00 15.5 
ASG Ieee Ariota hee A lela. t 345.50 125.0 | ae") te a Ne elo | 7,750.00 15.5 
FT G0 meaner aati renee 485.00 S90 ()i|| S100 mee ne ee eae cera 8,102.00 15.5 
TEED oe stale, ES RN ON ee S200) |S aee I Sa, ie as Dee ot ne 8,550.00 15.5 
iyi eo as Sa 1,057.00 D5 10H tel COS een eee sass ee ree | 9,000.00 16.0 
ASI So ea Ae ee as 1,129.00 22.0 | 1906 Seer sees ST Me a 12,000.00 21.4 
Nore.—The production is given in tons of 2,240 pounds and the price in pence per 
pound. From 1902 onward the production figures are estimated, and from 1897 to 1904 
the figures for price are based on the American values. 
The manufacture of aluminum is now carried on in a number of 
works, controlling over 84,000 horsepower. Details of these so far 
as they are known, are given below. 
Name of company. Locality of works. beac 
MOVES Ns dB = ee eases ee eee 25,000 
TS BritisheA laminin) © Oks = seen aa eee bsorvay Pe a ee ns oe a ee Eee 210,000 
Switzerland (in course of erection)_-| %45,000 
2. Société Electro-Metallurgique Francaise__-___--_- ie Prag. ------------------------------ 7,500 
Gardanneés:22-=-22e5- 22. es2eesse eee 7,500 
5 ; Pane Sieh d Rete. aly psoset es eS ee ie ee 10,000 
8. Compagnie des Produits Chimiques d’Alais____-- ee Aeliens ns 2,500 
INeuhausenit 22) Seen eee ees 5,000 
4, Aluminium Industrie Aktien-Gesellschaft_____-_.- psn BE PN Rok Stee See 5,000 
. Bend! Gasteins 2--222e22 = eee 15,000 
DMOOMparniavlcallanness = 2s semen naan eee Pes¢ar asta eee ee ee oe es 43,000 
Niggaragh alls seeass ee eae ea 10,000 
GaebPittsburcwReduction Oowre sss sees ssi Falls (Camada)—-------- 5,000 
IMaSSenase Nap eae 12,000 
@ Qn the authority of the Revue Industrielle, 1907, p. 222, as quoted in L’Industria. 
Assuming that 4 horsepower are required for one year, to produce 
1 ton of aluminium, the aggregate power available in these works 
would suffice to produce 35,000 tons of the metal per annum. Owing, 
however, to the diminished power available during the summer 
droughts and to other causes, the maximum total of power is not 
available for the manufacture all the year round, and my estimate 
of the 1906 production is about 12,000 tons. 
The past year has been marked by the expiration of five of the 
United States patents granted to Hall in 1889. The Heroult patents 
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