To-day all that is changed. A chemical corps has come out to join the sappers, and the gunners have received some highly finished trench-mortars from Vickers's. A trench mortar is a kind of toy howitzer and very useful when you want to try conclusions with a neighbouring trench at short range. The mortars are not exactly things to play with, and so two "schools" of mortars have been instituted to teach R.G.A. men how to handle them. Every morning at nine o'clock two young subalterns meet their class of fifty pupils in a château, and explain with the aid of a diagram on a blackboard the internal economy of the mortar and its 50-lb. bomb, the adjustment of angles of elevation to ranges, and the respective offices of fuse, charge, and detonator. When the class have had enough of this they go off to a neighbouring field to simulate trench warfare and hold a demonstration. This is real sport. They have dug a sector of trenches, duly traversed, and at some two or three hundred yards distance have dug another sector and decorated it realistically with barbed-wire entanglements. Thither one afternoon we conveyed the mortar to the first trenches on an improvised carriage, placed it behind one of the traverses, and duly clamped it down. The subaltern took up a periscope and got the thread-line on the target—you find the range without instruments and by your own intuitions. "Three hundred, I think," he remarked pensively. A pupil adjusted the range indicator at 71·30 to get the elevation, and his assistant took up what looked like a huge jar of preserved ginger. It was the bomb. Having put the tail to it he inserted the detonator. "Fuse at 27." He set the indicator with as much care as if he were setting the hands of his watch. The man took the fuse delicately, put in the test-tube and attached the lanyard. These operations had been closely followed by the class, who made a circle round the bomb like a football "scrum." It was now time to line the trenches, for the "tail" of the bomb is apt to kick viciously when the thing is fired. As they spread out, the man removed the two safety-pins in the top of the fuse and pulled the lanyard. There was a voice of thunder and a sheet of flame, followed by what seemed an interminable pause. We scanned the brown furrows in front of us and suddenly the earth shot skywards in a fan; a cloud of dirty-black smoke floated over our target. The whole class leapt the parapet and streamed away across the furrows like a pack of hounds in full cry, until they suddenly disappeared below the surface of the earth. We followed and found them standing in a huge crater whose sides were hollowed out as neatly as those of a cup. "Done it again," said the subaltern complacently, "we've never had a blind."
At the Machine-gun School they do things on a larger scale, and Wren's could teach them nothing in the art of cramming. The Instructor reckons to put his class of 200 officers and men through a six months' course in a fortnight. There is need for it. The Germans started this war with eleven machine-guns (it is now anything from twenty to forty) to a battalion. We started with two. For years they have enlisted, trained, and paid a special class of men to man them. Consequently we had a great deal of leeway to make up. We are making it up, hand over fist, thanks to the Instructor, one of the most brilliant and devoted officers I know, and a man who spends his nights in inventing or perfecting improvements. He has got a pocket edition of a machine-gun made of tempered steel and weighing only 27 lb., as against our old one, which is of gun-metal and weighs 58 lb.—a material difference when it is a question of an advance. The new one, he explains somewhat illogically, with paternal pride, can be carried into action "like a baby." Having decided to give it a trial we carried it tenderly to a quarry and proceeded to "feed" it with a belt of cartridges. The Instructor set up a small stick against the bank of a gravel quarry and returned and adjusted the tangent-sight at 100 on the standard. He got the fore-sight and back-sight in a line on the stick, seized the traversing-handles, released the safety-catch, and pressed the button with his right thumb with the persistency of a man who cannot make the waiter answer the electric bell. "Tap—tap—tap." There was a series of explosions as though the sparking plug of a motor-bicycle was playing tricks. The target danced like a thing possessed. It hopped and skipped and curtsied under that deadly stream of bullets. Then he slowly swept that gravel bank with the traversing handles till the pebbles jumped like hailstones. "I think she'll do," he remarked appreciatively as he folded up the tripod.
The R.E. is the Army's school of technology. To do a survey or make a bridge or lay a telephone is all in the day's work. But your sapper is a man of ideas, and is for ever seeking out new inventions. So he has turned his attention to chemistry, and "R.E." has a chemical corps which has put aside the blow-pipe and the test-tube at home to come out and study the applied chemistry of war. Just now they are engaged in discovering the most effective method of laying noxious gases. Copper vessels of ammonia in a trench to disperse the gas when it gets there are all very well, but by that time you may have more pressing attentions of the enemy to engage you; the thing is to prevent the gas getting there. Hence ingenious minds are considering how to project with a spray something upon the advancing fog which will bring it to earth in the form of an innocuous compound. Spray that something over the parapet, and if you can spray it far enough and wide enough you may precipitate the deadly green and brown mists into chlorides or bromides which will be as harmless as bleaching-powder and not less salubrious.
Others have turned their attention to automatic flares. You can get a startling illuminant if you suspend a test-tube containing sulphuric acid in a vessel of chlorate of potash, and it will be all the better if you add a little common sugar and salt. You balance your test-tube in the hollow of a bamboo stick and fill the top knot of the stick with the chlorate of potash; then you plant your sticks, not too securely, outside your barbed-wire entanglements, and string them together with a trip-wire. As for the patrolling Hun who bumps against that trip-wire, it were better for him that a millstone were hung round his neck.
This is Higher Education and post-graduate research. But elementary education is not neglected. At the H.Q. of the —th Corps is an O.T.C. where privates in the H.A.C. and the Artists practise the precepts of the Infantry Manual and study night operations in the meadows within sound of the guns.
Truly it is, in the words of the stout Puritan, a nation not slow and dull but of a quick, ingenious and piercing spirit, acute to invent, subtle and sinewy, not beneath the reach of any point the highest that human capacity can soar to.