The efficiency, rapidity of fire, and elasticity of cannon have so improved in the past decade that a battery of four guns now requires one hundred and eighty men, six or seven officers, and two hundred horses to manage it. What with mathematical instruments to direct fire, instrument wagons, field forges, spare parts, and twelve or sixteen caissons, every horse and man belonging to the battery is necessary when a stiff action is going on. The guns shoot six thousand yards and the four can between them fire eighty shots a minute. Each of the shells weighs about eighteen pounds, costs up to twenty dollars to manufacture, and is freighted with almost unbelievable possibilities of death and destruction. When using shrapnel a single battery can during any sixty seconds fire thirty-five thousand well-directed bullets against advancing infantry. A battalion of infantry in charging will average about two hundred yards a minute--and during that minute a single battery can fire against it thirty-five bullets for every man in the battalion. The field guns of all nations shoot approximately the same shell, three inches in diameter. These guns are so small and light in appearance that it is difficult to realize their power until one has seen its effects. Their barrels are perhaps six feet long and from five to seven inches in exterior diameter. A light but very complicated running-gear supports them. This rests upon two wagon-wheels quite ordinary in appearance. The whole is painted smoke-gray and looks quite toy-like and harmless. * * * * * I had lunch with Mr. Penfield today at his official residence and it was an extremely interesting event. The building is said to be the finest ambassadorial residence in the world of any nationality. I can easily believe it. In the very heart of Vienna the house has behind it a garden of some two acres with many fine hothouses. Seven gardeners are required. On the other side, the Embassy faces on a large public garden and thus every one of the sixty big windows which the mansion possesses faces on one garden or the other. The house is adorned with Meissoniers, Van Dykes, Chinese rugs, and other things of a like value. The house was shown to me from top to bottom by Mr. Penfield. * * * * * At present there is great excitement in Vienna over the fall of Count Berchtold, the Prime Minister, announced publicly this morning. * * * * * I am to leave for Berlin, London, and Paris, and then home as soon as possible. * * * * * _Vienna, Friday, January 15th._ I am doing my best to see Vienna so thoroughly in an architectural and artistic way that I shall not find it necessary to return for purposes of study. * * * * *