Flight By Machines Heavier Than Air Is

Ten Decimal Places Of π Are Sufficient To Give The Circumference Of The Earth To A Fraction Of An Inch, And Thirty Decimal Places Would Give The Circumference Of The Visible Universe To A Quantity Imperceptible To The Most Powerful Microscope.

We Are Probably Nearing The Limit Of All We Can Know About Astronomy.

What We Now Call School Training, The Pursuit Of Fixed Studies At Stated Hours Under The Constant Guidance Of A Teacher, I Could Scarcely Be Said To Have Enjoyed.

A Few Years Later The Naval Academy Was Founded At Annapolis, And A Similar Course Was Pursued To Provide It With A Corps Of Instructors.

Whenever A Total Eclipse Of The Sun Was Visible In An Accessible Region Parties Were Sent Out To Observe It.