[10] The phosphorescent disease of the sand-hopper (Talitrus) is described by Giard and Billet in a paper entitled ‘Observations sur la maladie phosphorescente des Talitres et autres Crustacés,’ in the memoirs of the Société de Biologie, Oct. 19, 1889. Billet subsequently gave a further account of this organism, and named it Bacillus Giardi—after Professor Giard of Paris. (Bulletins scientifiques de la France et de la Belgique, xxi. 1898, p. 144).
It appears that the parasite is transmitted from one individual to another in coition. The specimens studied by Giard and Billet were obtained at Wimereux near Boulogne. I found the disease very abundant at Ouistreham near Caen in the summer of 1900. I have not observed it nor heard of its occurrence on the English coast. Sea-water commonly contains a free-living phosphorescent bacterium which can be cultivated in flasks of liquid food so as to give rich growths which glow like a lamp when the flask is agitated so as to expose the contents to oxidation. This bacterium is not, however, the cause of the ‘phosphorescence’ of the sea often seen on our coasts. That is due in most cases to a much larger organism, as big as a small pin’s head, and known as Noctiluca miliaris.
[11] As little is the question of the use and abuse of food and drink dealt with, as yet, by civilized man. As in many other matters man has carried into his later crowded, artificial, nature-controlling life habits and tendencies derived from savage prehistoric days, so has he perpetuated ways of feeding which are mere traditions from his early ‘animal’ days, and have never been seriously called in question and put to proof. The persistence under new conditions of either habit or structure which belonged to old conditions may be attended with great danger and difficulty to an organism which changes, as man does, with great rapidity important features in its general surroundings and mode of life. This is in effect Metschnikoff’s doctrine of ‘désharmonies.’ It is probable that in very early days when a tribe of primitive men killed a mammoth, they all rushed on to the dead monster and gorged as much of its flesh as they could swallow (cooked or possibly uncooked). They had to take in enough to last for another week or two—that is to say, until another large animal should be trapped and slain. Accordingly he who could eat most would be strongest and best able to seize a good share when the next opportunity arrived, and it naturally became considered an indication of strength, vigour, and future prosperity to be capable of gorging large quantities of food. By means of the phrases ‘enjoying a good appetite,’ or ‘a good trencherman,’ or other such approving terms, civilized society still encourages the heavy feeder. The lower classes always consider a ravenous appetite to be an indication of strength and future prosperity in a child. Most healthy men, and even many women, in Western Europe, attack their food and swallow it without sufficient mastication, and as though they did not hope to get another chance of feeding for a week or two to come. Medical men have never ventured to investigate seriously whether civilized man is doing best for his health in behaving like a savage about his food. It is their business to attend to the patient with a disordered digestion, but not to experiment upon the amount of food of various kinds which the modern man should swallow in order to avoid indigestion and yet supply his alimentary needs. No individual can possibly pay medical men to make these observations. It is the business of the State to do so, because such knowledge is not only needed by the private citizen, but is of enormous importance in the management of armies and navies, in the victualling of hospitals, asylums, and prisons. Thousands of tons of preserved meat have been wasted in recent wars because the reckless and ignorant persons who purchased the preserved meat to feed soldiers had never taken the trouble to ascertain whether preserved meat can be eaten by a body of men as a regular and chief article of diet. It appears that certain methods of preserving meat render it innutritious and impossible as a diet.
It is probable from recent experiment that we all, except those unfortunate few who do not get enough, eat about twice as much as we require, and that the superfluous quantity swallowed not only is wasted, but is actually a cause of serious illness and suffering. It surely is an urgent matter that these questions about food should be thoroughly investigated and settled. In the opinion of the most eminent physiologist of the United States (Professor Bowditch), we shall never establish a rational and healthy mode of feeding ourselves until we give up the barbarous but to some persons pleasant custom of converting the meal into a social function; we are thus tempted into excess. Only long and extensive experiment can provide us with definite and conclusive information on this matter, which is far more important than, at first sight, it seems to be. And similarly with regard to the admittedly serious question of alcohol—only very extensive and authoritative experiment will suffice to show mankind whether it is a wise and healthy thing to take it in small quantities, the exact limits of which must be stated, or to reject it altogether.
[12] It is, perhaps, needful to point out that what is aimed at is that the education of all the youth of the country, both of pass-men and of class-men, of girls as well as of boys, of the rich as well as of the poor, should be primarily directed to imparting an acquaintance with what we already possess in respect of knowledge of Nature, and the training of the pupil so as to enable him or her (a) to make use of that knowledge, and (b) to take part in gaining new knowledge of Nature, at this moment needed but non-existent. This does not involve the complete exclusion of other subjects of instruction, to which about one-third of the time and effort of school and college life might be devoted.
[13] I desire especially to draw the attention of those who have misunderstood and misrepresented my estimate of the importance of the study of History, to this paragraph.—E.R.L.
[14] The practical steps which would correspond to the views enunciated in this discourse are two. First, the formation of an educational association to establish one or more schools and colleges in which nature-knowledge and training in nature-searching should be the chief matters to which attention would be given, whilst reasonable methods would also be employed for implanting in the minds of the students a love and understanding of literature and other forms or art. Those who desired such an education for their children would support these schools and colleges, just as in the days of Anglican exclusiveness the Nonconformists and Roman Catholics supported independent educational institutions. The second practical step would be the formation of a political union which would make due respect to efficiency, that is to say, to a knowledge of Nature, a test question in all political contests. No candidate for Parliament would receive the votes of the union unless he were either himself educated in a knowledge of Nature or promised his support exclusively to ministers who would insist on the utilization of nature-knowledge in the administration of the great departments of State, and would take active measures of a financial character to develop with far greater rapidity and certainty than is at present the case, that inquiry into and control of Nature which is the indispensable factor in human welfare and progress. Such a programme will, I hope, at no distant date obtain the support of a sufficient number of parliamentary voters to raise political questions of a more genuine and interesting character than those which many find so tedious at the present moment.
[15] It seems necessary to emphasize that I here say merely that no “new support” is given to the notion of so-called telepathy, a support some persons have wrongly claimed. I do not say that the notion is rendered less likely to prove true than it was before.
[16] See the introduction to Part II. of a Treatise on Zoology. Edited by E. Ray Lankester (London: A. & C. Black).
[17] From the Jubilee volume of the Soc. de Biol. of Paris, 1899. Reprinted in Nature, vol. lxi., 1900, pp. 624, 625.