Hints to Travellers, Scientific and General, Vol. 2 / Tenth edition, revised and corrected

by Royal Geographical Society

A traveller may be puzzled, in the midst of the profusion of animal and vegetable forms which he sees around him, to know what to collect and what to leave. Books can be of little service to him on a journey, and he had better at once abandon all idea of encumbering himself with them. A few days study at the principal museums before he starts on his voyage may teach him a great deal, and the cultivation of a habit of close observation and minute comparison of the specimens he obtains will teach him a great deal more. As a general rule all specimens which he may meet with for the first time far in the interior should be preferred to those common near the civilised parts, and he should bear in mind that the few handsome kinds which attract the attention of the natives, and are offered for sale to strangers, are almost sure to be of species well known in European museums. He should strive to obtain as much variety as possible, and not fill his boxes and jars with quantities of specimens of one or a few species, but as some of the rarest and most interesting species closely resemble others which may be more common, he should avail himself of every opportunity of comparing the objects side by side. In most countries, as already remarked, the truly indigenous, and often the rarest, species are to be found only in the mountains at considerable elevations and in the primitive forests, the products of cultivated districts being nearly all widely distributed and well known. In Botany a traveller, if obliged to restrict his collecting, might confine himself to those plants which are remarkable for their economic uses; always taking care to identify the flowers of the tree or shrub whose root, bark, leaves, wood, etc., are used by the natives, and to preserve a few specimens of them. But if he has the good fortune to ascend any high mountain not previously explored, he should make as complete a collection of the flowering plants as possible, at the higher elevations. The same may be said of insects found on mountains, where they occur in great diversity—on the shady and cold sides rather than on the sunny slopes—under stones, and about the roots of herbage, especially near springs, on shrubs and low trees, and so forth; for upon a knowledge of the plants and insects of mountain ranges depend the solution of many curious questions regarding the geographical distribution of forms over the earth. In Reptiles, the smaller Batrachians (Frogs, Salamanders, etc.) should not be neglected, especially the extremely numerous family of tree-frogs; the arboreal, or rock-haunting species of Lizards seen out of reach, and the swift-running forms that inhabit sandy plains may be secured with a charge of dust-shot, the saloon pistol being especially handy for this purpose. Snakes should be taken without injuring the head, which is the most important part of the body: a cleft stick may be used in securing them by the neck, or they may be shot, and on reaching camp placed in the jars of spirits. As large a collection as possible should be made of the smaller Fishes and Tortoises of lakes and rivers.

Mammals and Birds.[13]—An ordinary geographical expedition will hardly have the means at its disposal for bringing home many specimens of the larger animals, but many species in regions visited only by adventurous explorers are still desiderata in the large museums of Europe; and additional specimens of all genera of which there are numerous closely allied species (e.g., Rodents, Antelope, Deer, etc.), and of all the small nocturnal mammals would be welcome to zoologists. If only portions can be obtained, skulls with horns attached are to be preferred. The smaller birds shot on an excursion should be carried to camp in the game bag, folded in paper, the mouth, anus and any wounds being first plugged with cotton-wool. In a hot climate when the birds have to be carried for some distance before they are skinned, a plug of cotton-wool dipped in a weak solution of formaline or in spirits should be pushed down the gullet into the stomach, before the mouth is plugged with dry cotton-wool. This precaution will insure specimens remaining fresh for many hours.

Small dull-coloured birds are most likely to be new or interesting. Immediately after killing a small mammal or bird, make a note of the colour of its eyes and soft parts, and, if time admits, of the dimensions of its trunk and limbs. Full directions for skinning will be found in the British Museum ‘Handbook,’ pp. 15-29. It should however be mentioned that in large-headed Parrots, Woodpeckers, Ducks, and some other birds, in which the skin of the head cannot be turned back, an incision has to be made in the nape, through which the skull can be pushed and cleansed, the incision being afterwards closed by two or three stitches. In finishing the skin of a bird the feet should be placed side by side, with the claws folded and fastened together by means of a pin run transversely through the soles. The protruding ends of the pin can afterwards be cut off close to the feet. This is Mr. W. Foster’s plan, and is by far the best and neatest method. When the skin is dry, it should be laid on its back in one of the trays fitted into the zinc-lined collecting boxes, and secured by means of a couple of stout pins passed through the head at the base of the lower mandible and through the root of the tail. By dovetailing the specimens into one another, they can thus be packed with the least loss of space, and need not again be moved. They require no wrapping or paper, and are much more easily looked over to see that no insects have attacked them.

Preserving Mammals, etc., in Alcohol.—When Mammals cannot be prepared as skins with skulls, according to the British Museum directions, they may prove of service if preserved in spirits. Indeed, when a series of skins has been made, additional specimens may well be placed in spirits, while in the case of Bats half the individuals taken of any species should be skinned and half put in spirits.

On the subject of the preservation of such spirit specimens, the late Dr. G. E. Dobson has published the following ‘Hints’:—

General Collecting-Case.

The general collecting case should be made of strong block tin, or, better still, of copper, rectangular in form, about 2 feet × 1 foot × 1 foot 8 inches in height, having in the top a circular aperture from 6 to 8 inches in diameter, closed by a well-fitting brass screw-cap, the flange of which is made air-tight by a well-greased leather collar. This should fit accurately into a similarly shaped box of inch boards, having a simple flat lid (not projecting beyond the sides), secured by eight long screws, and provided with a strong iron handle. This case should be filled with the strongest methylated spirits procurable (in foreign countries over-proof rum, brandy, or arrack will suit equally well). If circumstances admit, two or more such cases should be taken, or four wide-mouthed earthenware jars placed in a square wooden case, separated by light wooden partitions, and having their mouths closed by well-fitting bungs tied down with bladder and string. On arrival at the collecting station one of the jars should be half filled with spirits from the tin case. Into this each specimen, as it is obtained, having been slit along the side of the abdomen, should be put, and allowed to remain 24 hours before being transferred to the general collecting case. When the latter can hold no more the specimens should be removed one by one and packed in the moist state in the other wide-mouthed jars, one above the other, like herrings in a cask, each rolled in a piece of thin cotton cloth, in which a label, having the locality and date written in pencil, should be placed. When the jar has been thus filled to the mouth a glass or two of the strong spirits (kept in reserve) should be poured in so as to fill up the interstices, but not to appear on the surface, which should be covered with a thick layer of cotton-wool. A few drops of carbolic acid, if the spirit be weak, will greatly aid its preserving powers. The bung should then be replaced, secured round the margin outside with a mixture of tallow and wax, and tied down securely with bladder or skin, and the name of the collector and district written legibly outside. The jar is now ready for transmission to any distance, for specimens thus treated will keep good in the vapour alone of strong spirits for months. Other jars may be filled in like manner, and finally, the general collecting case. Incisions should invariably be made in the sides (not in the centre line) of all animals, so as to allow the spirits to enter, and no part of the intestines should be removed. In the case of Tortoises the opening may be made in the soft parts round the thighs; if this be not done, the body soon becomes distended with gases. Frogs should always be first placed in weak spirits, and after being soaked for one or two days, be removed to strong alcohol. Crabs should be rolled up alive in thin cotton-cloths, secured by thread tied round, and may then be readily killed by immersion in alcohol; if this be not done they lose many of their limbs in their dying struggles.

Preparation of Skeletons of Animals.—In many cases it will be found impossible to preserve the whole animal, especially if of large size, but it may advantageously be converted into a skeleton by attention to the following directions of the late Sir W. H. Flower, F.R.S.