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 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 the end of the game, the ball would be dark with grass, mud, and tobacco juice, and it would be misshapen and lumpy from contact with the bat.

By turns, they smeared it with dirt, licorice, tobacco juice ; it was deliberately scuffed, sandpapered, scarred, cut, even spiked.

By the middle of the century, the population was bolstered by emigration from the Canary Islands, resettling the northern part of the colony and planting tobacco in the Cibao Valley, and importation of slaves was renewed.

By that time, planters outnumbered buccaneers and, with the encouragement of Louis XIV, they had begun to grow tobacco, indigo, cotton, and cacao on the fertile northern plain, thus prompting the importation of African slaves.

By the end of the 18th century, the tobacco industry in Virginia had been completely ruined by soil exhaustion and low prices.

By prohibiting tobacco he assimilated the idles gathering in the taverns.

By the Qing Dynasty, it became the most popular method to smoke tobacco, but became less popular since the Republic era.

By 1830, the cigarette had crossed into France, where it received the name cigarette ; and in 1845, the French state tobacco monopoly began manufacturing them.

By the end of 1957, Nasser nationalized all remaining British and French assets in Egypt, including the tobacco, cement, pharmaceutical, and phosphate industries.

By contrast, 20 percent of the total export value in 2009 originated from the agriculture sector, mostly through the export of fish ( mainly shrimps and prawns ), timber, copra, cashew nuts and citrus, cotton, coconuts, tea and tobacco.

By 1757, the building was referred to as " The Falls Church ", as it was located along the main tobacco rolling road from the Little Falls of the Potomac River.

By 1866, he harvested 20, 000 pounds of Burley tobacco and sold it in 1867 at the St. Louis Fair for $ 58 per hundred pounds.

By 1883, the principal market for this tobacco was Cincinnati, but it was grown throughout central Kentucky and Middle Tennessee.

" By the time of the Civil War, one-third of the county population was African American, most of whom were enslaved laborers on major plantations, particularly for labor-intensive tobacco cultivation.

By the turn of the century, an agricultural boom in dark leaf tobacco had made Caldwell County, along with Christian County, a major tobacco growing area.

By the turn of the century, an agricultural boom in dark leaf tobacco had made Caldwell County, along with Christian County, a major tobacco growing area.

By mid-century, Henderson County had become a major producer of tobacco, much of which was exported to Great Britain.

By the early 1900s, Madisonville was a rail hub, coal mining center, and had a large tobacco market.

By 1812, the Augusta Forge went out of business and the Augusta Tract owned by Townsend was sold to Pierre Lorillard IV, who was in the tobacco business.

By 1858, Statesville was growing rapidly and soon afterward began leading the state in the production of tobacco and tobacco products, the manufacture and blending of whiskey, and became a large distribution center for roots and herbs.

By the early 1900s, the town had become a major market for cotton, watermelons and tobacco.