In [No. 36] the photographer scratched his initials crudely upon the window-pane; instantly Jack Frost began to elaborate the crude work, with much better effect.

[No. 37] is easily suggestive of a strip of very costly hand-made lace.

[No. 38] is a very beautiful arrangement showing two distinct types of window-pane frost. Observe how each type never intrudes upon another. The white fern-like type is raised from the glass, and was formed in a very cold room where it slowly developed and grew for days.

[No. 39] is another striking arrangement of the two types; observe the very delicate fleecy patterns of the frost which forms a background for the fern-like scrolls.

[No. 40] shows a perfectly developed fern; while in [No. 41] we have a strikingly beautiful example of a group of ferns; this type is heavily laid upon the glass, and develops in zero weather.

[No. 42] shows very clearly, in detail, the granular formation of the frost which has drawn away from the true frost crystals forming in detached places, in order to give them room to complete their elaborate patterns.

[No. 43] shows an extremely graceful feather effect, with beautifully curved scroll like tips.

[No. 44] is a very striking arrangement of window frost, showing exquisitely arranged branches, resembling evergreens, shooting out into the clear spaces upon the glass.

55. A maple leaf etching