sure of a slow plate. Three or
four successive reflections into a totally dark chamber will suffice
in five or six minutes.

When an important subject cannot be revisited it is well to take
duplicates; the camera should be shifted laterally a few inches for a
near object, or a few feet for a distant view, and then the two films
will form a stereograph, if both succeed.

In arranging groups of small objects, put together what will go in a
three-inch circle, and minor pieces around, and then the best in the
middle can be printed direct on lantern slides.

7. Preservation and Packing.

While travelling little can be done for preserving objects. Papyrus
rolls should be wrapped at once in a damp handkerchief, to be
carried, and then wrapped in paper, packed in a tin box, and filled
round with cotton wool. Small papyri can be safely damped in a wet
cloth, and flattened out between the leaves of a book; secure one
edge straight in the hinge, and gradually press flat and secure by
advancing leaves over it. Glass, if perfect, should be packed in tins
with wool; old food or tobacco tins do well for tender things.

Flint implements and coins, though hardy, should be saved from
grinding by wrapping in waste paper.

Ivory, if it has been buried, is very liable to flake. The cure is to
soak it in paraffin wax; but temporarily it is secured by winding
cotton thread round it in many directions. Some anoint it with
vaseline, but if vaseline penetrates the ivory, it will not take up
paraffin or gelatine later. Tender wood may be likewise saved.

A much-cracked glazed jar was packed by winding string round it in
all directions, with tufts of wool under the string.

A whole mummy in most fragile condition, so that it could not be
lifted, was made up solid with 40 lb. of paraffin wax which was
melted out of it afterwards in England, making hardly any change. If
contracted burials should be preserved, dust carefully, splash on
about 5 lb. of paraffin wax heated to smoking-point. When cold,
detach from soil, turn over, paraffin the lower side, and build up
weak parts with a sludge of melted paraffin and sand, nearly chilled.
About 8 to 10 lb. of wax will do the whole. The skull should be
packed separately. Pad all hollows of the body with soft rag to
spread pressure in packing. Paraffin wax is the best preservative as
it is tough, and may be used as a coat over an object for safety.
When not needed it can be cut away, or melted awa