β Scribed by Smart, R.
No coin nor oath required. For personal study only.
It is concluded from experiments on the pH vrilues iind nhiiking times of vnrious anmples of Mount Sorrel granite thnt the pH rnluc hns little or no connexion with adhesion and it is considered thut this applies in general to nll stones. The pH depends on the grading rind appenrs to be rnther fortuitous in chnrncter. Analysis of the contact water lins shown that the alknlinity is in general due to sodium c.rrrbonnte prrsent throughout the stone, but for the limestones it is not present in sufficient ;mount. nnd hence the pH vnlue obtained niust be due to the presence of cnlciuni hydroxide in tlynumic t~quilbrium with either calcium silicnte or some siniilnr cnlcium t~ompoirntl. The pH is in p r t iliic to Iiytlrolysis, since in some cwes a viilue of 7.8 cnn hc obtninctl by hytlrolysis of the cirrbonnte itself, nnd this vnlue ~sould probnbly tlecreitsc with increasing particle &e. The dguirmic equilibrium has liecn eviclcncetl liy the fiilling pβ¬C on removing the stones from the writer. Esso Europeun Lnborntorics, Albert Enibnnknient , LOII~OII, S.E.ll Iiecelrecl Pny 21, 1043 THE DETERMINATION OF SODIUM IN ALUMINIUM AND ITS ALLOYS By R. SMART Tliu clicinii~iil cleteruiinntion of milium in nlii~iiiniinn niicl durriliiinin lins becn stuclicd, niiil tlimu tnctlimls linvu been duvelolx-d. two of nliieli nre suitnblo for liiiru riliiminium nnil its nlloys. ~vhilu tliu tliirtl is npplienblc to piim uliiminium only. Tliu methotls sliow sntibfuctory iibwcnient with cncli utlwr over n rnnge of O.OOl-O.2~~ sodiiim content. 1)iiniluiniii wns found to contnin O ~O O l -4 b O O ~~o of encliiiin, 1ium riluniiiiiuni 0.001-0.0070/, of aorliiiiii, nntl super-purity nluiiii!iiuni less tliriii 0401~/,. * " Annlynis of Aluminium nnd its Alloys," British riluminium Conipny. 1011, I'll. 10-50. "'CLo Dotorminotion of Sodium in Di~rnlurnii~ untl Pure Aluminium," Hritiali Aluminiunl Co,, Extcrnnl Itoport of tho B.N.F.M.R.A., NO. 23% JM., 1013.
π SIMILAR VOLUMES
Humidity 0.00 0.05 0.10 0.20 0.30 0.40 0.lX 0.00 0.70 0.80 0.70 0.00 0.50 0.40 0.30 0.20 0.10 0.05 0.00 wnter contcnt Initinl Raw Whit0 I Yolk Water content, g. p r 190 g. Matcrinl Dry wt. I Material Dry wt. ~~~~ I Cooked \Vhite I YOU( Wntcr content, g. per 100 g. Mntcrinl Dry art. 1 Mntcrinl Dry wt
sotliuni, nnd the ngreenient tins 11ec.n fount1 t o be sntisfnctory (Tnblc V). ## TAIILE V C o i i ~~r i w i ~ oj c!aiyl irlcohol and Srhetrer tnclhala oil purc a l i i i r ~i ~~i ~~i n . 4111y1 lllcollol Schcucr mcthocl method Snmplo yo Xn Nn
## 404 SHORT COMMUNICATION i.e. 96,5oo C/o.5 mole of water) amounts to 17. 9 pA for each mg of water present per cubic meter gas at 760 mm and 20 Β°. Expressing the water content in p.p.m. (v/v), this factor becomes 13.4 pA. The range of the cell is from 5-2000 mg of water per cubic meter. Both the
## Abstract On the basis of results so far available on inhibitors for water, sodium chloride and other salt solutions new results are reported which were obtained with respect to the inhibition in sodium persulfate solutions. The inhibitors studied in this context show increasing efficiency in the