There are a great many different kinds of negative varnishes - some are applied to the negative cold, while for the application of others it is necessary to heat the negative. The following formulae will be found to give per-

feet satisfaction, if the directions accompanying each are carefully carried out:

COLD VARNISH.

Best Grain Alcohol ..........................

20 ozs.

Crushed Dark Shellac .......................

1 oz.

Shake occasionally for several days until dissolved (without heat). Allow it to settle; then decant carefully from the settlings and add two drams of oil of lavender. The negative should be slightly warmed before varnishing.

COLD VARNISH.

Sandarac........................................................

1 oz.

Mythelated Chloroform................................

6 ozs.

Shake until dissolved, then filter.

NEGATIVE VARNISH APPLIED WITH HEAT.

Shellac.............................................................

3 1/4 ozs.

Sandarac..........................................................

3/4 oz.

Mastic..............................................................

40 grs.

Castor Oil........................................................

1 dr.

Rectifid Spirit...................................................

30 grs.

Dissolve and filter.

HOT VARNISH.

Sandarac................................................................

1 1/4 ozs.

Benzoin..................................................................

6 grs.

Alcohol...................................................................

20 ozs.

Oil of Lavender.......................................................

4 drs

Dissolve by shaking, and filter.