representation to the
eye of the _view itself_, but of _a model of such view_; and the apparent
size of the model will vary with the angle of incidence of the two
pictures, being _smaller_ and _nearer_ as the angle increases. I believe
Professor Wheatstone recommends for landscapes 1 in 25, or about half an
inch to every foot.

GEO. SHADBOLT.

_Cement for Glass Baths._--In reply to numerous inquiries which have
appeared in "N. & Q." relative to a good cement for making glass baths for
photographic purposes, I send a recipe which I copied a year or two ago
from some newspaper, and which seems likely to answer the purpose: I have
not tried it myself, not being a photographer.

Caoutchouc 15 grains, chloroform 2 ounces, mastic 1/2 an ounce. The two
first-named ingredients are to be mixed first, and after the gum is
dissolved, the mastic is to be added, and the whole allowed to macerate for
a week. When great elasticity is desirable, more caoutchouc may be added.
This cement is perfectly transparent, and is to be applied with a brush
cold.

H. C. K.

---- Rectory, Hereford.

_Mr. Lyte's Mode of Printing._--All persons who have experienced
disappointment in the printing of their positive pictures will feel obliged
by MR. LYTE'S suggestion as to the bath; but as the preparation of the
positive paper has also a great deal to say to the ultimate result, MR.
LYTE would confer an additional obligation if he gave the treatment he
adopts for this.

I have observed that the negative collodion picture exercises a good deal
of influence on the ultimate colour of the positive, and that different
collodion negatives will give different results in this respect, when the
paper and treatment with each has been precisely the same. Does this
correspond with other persons' experience?

C. E. F.

* * * * *

Replies to Minor Queries.

_Eulenspiegel or Ulenspiegel_ (Vol. vii., pp. 357. 416. 507.).--MR. THOMS'S
suggestion, and his quotation in proof thereof from the Chronicler, are
farther verified by the following inscription and verses which I transcribe
from an engraved portrait of the famous jester:

"Ulenspiegel.

"Ligt Begraben zu Dom in Flandern in der grosen Kirch, auf dem
Grabister also Likend abgebildet. Starb A^o. 1301."

These lines are above the portrait, and beneath it are the verses next
following:

"Tchau _Ulenspiegeln_ hier. Das Bildniss macht dich lachen:
Was wur