e section
of the glass which it has divided, the direction of this cut being from
left to right.

In the same way section "A" seen upside down gives the appearance of a
_diamond_-cut, also from left to right, and multiplied 15-1/2 diameters,
while "B" held in the same position gives the same cut multiplied 78
diameters. The nature of these things is discussed at p. 48.

In their natural colour, and under strong light, they are very beautiful
objects under the microscope. Even a 10-diameter "Steinheil lens," or
still better its English equivalent, a Nelson lens, will show them
fairly, and some such instrument, opening out a new world of beauty
beyond the power of ordinary vision, ought, one would think, to be one
of the possessions of every artist and lover of Nature.

The illustrations that follow are from the work of the author and his
pupils conjointly. Those in which no _design_ has been added are for
clearness' sake described as "by the author"; but it is to be understood
that in all instances the transcribing of the work _in the glass_ has
been the work of pupils under his supervision. All design of diaper,
canopy, lettering, and quarries is so, in all the examples selected.

[Illustration: X.--Micro-photographs. Diamond and Wheel Cuts seen in
Section and Plan.]

PLATE XI.--_From Gloucester Cathedral--"St. Boniface" by the author and
his pupils._

[Illustration: XI.--Part of Window. Gloucester Cathedral.]

PLATE XII.--_From the same--"The Stork of Iona" and "The Infant Church,"
by the same._ Canopies from Oak and Ivy.

[Illustration: XII.--Part of Window. Gloucester Cathedral.]

PLATE XIII.--_Portion of a Window in progress (destined for Ashbourne
Church), by the author._ This has been specially photographed _on the
easel_, to show how near, by the use of false leadlines, &c., the work
can be got, during its progress, to approach to its actual conditions
when finished.

[Illustration: XIII.--Portion of Unfinished Window, photographed from
Work on the Easel.]

PLATE XIV.--_Drawings from Nature, by the author's pupils._ Pieced
together from various drawings by three different hands; made in
preparation for design of Oak "canopy." See p. 324 and Plate XI.

[Illustration: XIV.--Drawings from Nature, in Preparation for Design.]

PLATE XV.--_Part of East Window of School Chapel, Tonbridge, by the
author._ From the cartoon: the figure playing the dulcimer is underneath
the manger, above which is seated the