20 JOURNAL OF THE 
Bailey repeatedly crystallized the chloride from hydro- 
chloric acid, washed it with hydrochloric acid and then 
removed the free acid. 
(1) By washing with a mixture of one part alcohol and 
ten parts of ether. 
(2) By gently heating the salt. 
(3) By exposing the finely divided salt at ordinary tem-. 
peratures in a vacuous desiccator over potash until no 
hydrochloric acid appeared when air was passed over it. 
The analysis was performed by dissolving the salt in 
water and precipitating the zirconia with ammonia, then 
acidulating with nitric acid and precipitating the chlorine 
by means of'silver nitrate. By method (2) a constant and 
progressive diminution of chlorine was observed. ‘There- 
fore no analyses were made. [For the other methods he 
eives the results of the analyses by a statement of the 
relation of ZrO, to AgCl. 
ZrOo: AgCl 
Berzelinsideternination +... ....eeusee les? See 
4 SES SEES. tt UR eee «5 che eee pS 2.260 
Bailey Se Method! Fi ie tetra... eee eee be 1 2.206 
4 45 we a Wik tae Se Oe ee 1 2.179 
am ‘ os a te aa’ id ke aa 1 2.226 
Ae AES te TER EP ME oy BLE ot - 2.260 
: } Se AED ve SEA PRINS oe a) St 1 2.264 
” without washing...... 1 2.245 
i ee oe a ee ee j 2.309 
Clb Mate baie ihe REL ded ee AM oon = TP TR 1 2.285 
PR gy cto eae le ke ee bb ee ae Il 2.350° 
In all of these the drying has gone too far and some of 
the chlorine has been lost or the crystals still retained 
hygroscopic spa SG This salt, as will be seen later 
on, is not cae but ZrOC]1,.3H,O and the true ratio is 
Ao RoC: 12.327. 
Hermann pies Dict., 5, 1080.) states that the hydra- 
ted chloride, gotten in crystals on evaporating its aqueous 
solution, becomes opaque at 50° C., giving off part of the 
water and half of the hydrochloric acid and leaving a basic 
chloride or oxychloride, ZrCl,.ZrOQ,.18H,O or ZrOC1,.9H, 
O. ‘The same compound is obtained in stellate groups of 
