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There are 6 words hidden in the picture, can you find 1 of 6?
John introduces Mary as the daughter of the only son of my father's wife. How is Mary related to John?
What is the missing number in the pattern above?

Early electricity from wind

In 1892,“Electricity From Wind” was reported in the Cincinnati Enquirer, from the Philadelphia Record. Is said that“Owing to the comparative scarcity of water-power in many parts of England” to generate electricty, “attention has been given to wind power, of which the country is well supplied. A small experimental plant has been in operation at a flour-mill near London, the wind-mill supplying sufficient power to charge a storage battery, from which a number of arc and incandescent lamps were lighted nightly. Although the current obtained was small,” the experiment demonstrated the possibilities. The article suggested the use of wind-powered electricity generators at country houses on elevated ground. The article represents one example, not necessarily the first. Edison's incandescent lamp dates from 1879. Steam-powered central generating began in New York City in 1882.«

Longitude and latitude

The teacher of the Earth Science class was lecturing on map reading.

He spent the class explaining about latitude, longitude, degrees, and minutes. Towards the end of class, the teacher asked his students, "Suppose I asked you to meet me for lunch at 23 degrees, 4 minutes north latitude and 45 degrees, 15 minutes east longitude..."

A student's voice broke the confused silence, and volunteered, "I guess you'd be eating alone, sir."

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