By early summer 1915, Hilbert's interest in physics had focused on general relativity, and he invited Einstein to Göttingen to deliver a week of lectures on the subject.

By 1915, there were more than 60 students, mostly in residence.

By this time his relationship with the 25-year-old writer Mira Mendelson ( 1915 – 1968 ) had finally led to his separation from his wife Lina, although they were never technically divorced: indeed Prokofiev had tried to persuade Lina and their sons to accompany him as evacuees out of Moscow, but Lina opted to stay.

* By 1915, human expeditions discovered Anti-Metal in Antarctica.

By 1915 twenty-five percent of the nation ’ s foundry pig iron was produced in Birmingham.

By 1915, gangrene had set in and her entire right leg was amputated ; she was required to use a wheelchair for several months.

By 1915 there were makeshift depots at Madras and Calcutta.

By 1915, Zaharoff had close ties with both David Lloyd George and Aristide Briand.

By 1915, tobacco exports from the Philippines to America had annually increased as a result of the bill passing.

By November 1915 production had been expanded to produce 350, 000 lb ( 159, 000 kg ) of cordite per month for the Imperial Munitions Board.

By November 1915 production had been expanded to 350, 000 lb ( 159, 000 kg ) of cordite per month ( approximately 1, 900 tonnes per year ).

By 19 December 1915, General Sir Douglas Haig had replaced General Sir John French as Commander-in-Chief of the British Expeditionary Force ( BEF ).

By autumn 1915, with Asquith ’ s Coalition close to breaking up over conscription, he was blamed for the failure to bring in that measure and for the excessive influence which civilians like Churchill and Haldane had come to exert over strategy, allowing ad hoc campaigns to develop in Sinai, Mesopotamia and Salonika.

By autumn 1915 Asquith ’ s Coalition was close to breaking up over conscription, and in the absence of firm leadership ad hoc campaigns had developed in Sinai, Gallipoli, Mesopotamia and Salonika.

By 1915 the county had built of roadways, the most of any county in the state for its size.

By 1915, electricity lines ran from Magnetic Springs to Richwood.

By 1915, they began holding church meetings at the Gilbert Elementary School.

By 1915, the village boasted four cotton gins producing thousands of bales of cotton ; however, the decline in the demand for cotton led local farmers toward the growing of rice that is now the major crop of the area.

By 1915, there were over 600 residents.

By 1915, 3, 636 people lived in Tuxedo, about 20 % more than were reported in the 1990 Census.

By 1915, an engineering staff was employed, and plans made for valley-long channel improvements, levees, and basins to temporarily retain excessive rains.

By 1915, the population reaches 1, 000, with a bank, hotels, blacksmiths, three stores and a lumber yard.

By 1915, the biggest year for the factory, were planted, yielding 36, 915 tons of sugar beets, which were processed into 7, 722 tons of sugar.

By 1915, a published photo shows many more businesses along First Street.

By 1915 many farms were established in the irrigation district and the population of the flats was 5, 277.

By failing to do as he was told instantly -- to take out a permit or return the gun to his car -- he had played into Lord's hands.

By now Curt was seeing clearly again.

By her eighteenth birthday her bent for writing was so evident that Papa and Mamma gave her a Life Of Dickens as a spur to her aspiration.

By now she was sure she was going to have a baby, deciding it would be born in India or Burma that November.

By this time she had learned that it was futile to argue with her young husband, yet the uncomfortable fact remained: the American Congregationalists were sending them as missionaries to the Far East and paying their salaries.

By now he was undergoing a fresh torrent of abuse from Tory papers and pamphlets, and action was being taken to effect his punishment by expulsion from Parliament.

By this time word had got around that an American doctor was on the premises.

By our policy the West was -- is -- split.

By the time he was under the covers he had forgotten about seeing Kate.

By the time he was prosperous enough -- his goals were high -- he was bald and afraid of women.

By late afternoon the train inched into the marshaling yards in the railhead at Lublin, which was filled with lines of cars poised to pour the tools of war to the Russian front.

By odd coincidence, on the evening of her return Shelley chose to read Parisina, which was the latest of the titled poet's successes.

By the time the film was released we were three million dollars over-spent, war was imminent and the public apparently had forgotten all about Mother Cabrini.

By this method it was determined that the normal pressure exerted by a sample of polybutene ( molecular weight reported to be 770 ) was over half an atmosphere.

By comparing reaction cells sealed from the same manifold temperature dependency corresponding to activation energies ranging from 11 to 18 Af was observed while dependence on the first power of the light intensity seemed to be indicated in most cases.

By Nov. 8, 1958, weakness, specifically involving the pelvic and thigh musculature, was pronounced, and a common complaint was `` difficulty in stepping up on to curbs ''.

Serum potassium at this time was 3.8 mEq. per liter, and the hemoglobin was 13.9 gm. By Dec. 1, 1958, the weakness in the pelvic and quadriceps muscle groups was appreciably worse, and it became difficult for the patient to rise unaided from a sitting or reclining position.