_BERLIN, (via London,) May 13.--The German War Office announced today that in the recent fighting in Galicia and Russian Poland 143,500 Russians had been captured. It also stated that 69 cannon and 255 machine guns had been taken from the Russians, and that the victorious Austrian and German forces, continuing their advance eastward in Galicia, were approaching the fortress of Przemysl. The statement follows:_ The army under General von Mackensen in the course of its pursuit of the Russians reached yesterday the neighborhood of Subiecko, on the lower Wisloka, and Kolbuezowa, northeast of Debica. Under the pressure of this advance the Russians also retreated from their positions north of the Vistula. In this section the troops under General von Woyrech, closely following the enemy, penetrated as far as the region northwest of Kielce. In the Carpathians Austro-Hungarian and German troops under General von Linsingen conquered the hills east of the upper Stryi and took 3,650 men prisoners, as well as capturing six machine guns. At the present moment, while the armies under General von Mackensen are approaching the Przemysl fortress and the lower San, it is possible to form an approximate idea of the booty taken. In the battles of Tarnow and Gorlice, and in the battles during the pursuit of these armies, we have so far taken 103,500 Russian prisoners, 69 cannon, and 255 machine guns. In these figures the booty taken by the allied troops fighting in the Carpathians and north of the Vistula is not included. This amounts to a further 40,000 prisoners. Mr. Rockefeller and Serbia [Special Cable to THE NEW YORK TIMES.] LONDON, Thursday, May 13.--A Paris dispatch to the Exchange Telegraph Company, quoting the Cri de Paris, says: "John D. Rockefeller has just sent 35,000,000 francs ($5,000,000) to Prince Alexis of Serbia, President of the Serbian Red Cross Society. "Prince Alexis married last year an American woman, Mrs. Hugo Pratt, whose father loaned years ago L2,000 to Rockefeller when the oil king started in business." Italy in the War Her Move Against Austro-Hungary Last Phase of Italian Neutrality and Causes of the Struggle DECLARATION OF WAR. [By The Associated Press.] _VIENNA, May 23, (via Amsterdam and London, May 24.)--The Duke of Avarna, Italian Ambassador to Austria, presented this afternoon to Baron von Burian, the Austro-Hungarian Foreign Minister, the following declaration of war:_ Vienna, May 23, 1915. Conformably with the order of his Majesty the King, his august sovereign, the undersigned Ambassador of Italy has the honor to deliver to his Excellency, the Foreign Minister of Austria-Hungary, the following communication: