Sunday, April 5, 2026
US Frigate Constitution Enters San Francisco Bay -- 1933
Friday, March 13, 2026
Celebrating Joseph Priestley's Birthday - March 24, 1733
This coming March 24th, we will celebrate the 293rd year since the birth of this magnificent person, known by the name of Joseph Priestley, who has contributed so much to our civilization. He was born to a family of rather ordinary means in Birstall, West Yorkshire, England, in 1733.
Actually, at the time he was born, the Julian calendar was in use in England, and he was born on March 13, 1732. But when England switched to the Gregorian calendar and also started of the new year to January 1st, his birth date was changed to reflect the date we celebrate now.
He would go on to make significant contributions in many diverse fields. He is viewed by some today as the conscience of our modern way of thinking. We have extolled his many contributions to humanity in the pages of this blog; should you wish to learn more about him, feel free to browse the many entries about him that we have posted.
Yet, today, for most, he is a relatively unknown figure of history, or perhaps, only known as the person who first isolated the gas we now know as oxygen.
Friday, February 27, 2026
The Ross Precision Computer
Friday, February 20, 2026
The Day the Sky Turned Dark in New York City -- January 24, 1925
Calvin Coolidge, who had been the Vice President of the United States under Warren G. Harding, was now the President since Harding had suddenly died in office on August 2, 1923. At that time there was no way, unlike today after the passage of the 25th amendment to the Constitution in 1967, to nominate and confirm a Vice Presidential candidate to fill the vacancy created by Coolidge’s ascendancy to the Presidency.
Below is a local news article on the anticipated path of the area where the total eclipse would occur on that day.
You can see that New York City is on the southern fringe of the area covered by the total eclipse.
The following beautiful and rare art photo of the Total Eclipse of the Sun was taken by David Yerex from Highbridge Park on Washington Heights, overlooking the Harlem River and the Bronx, New York City, January 24th, 1925 at about 9 A.M.
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| Image copyright 2016, Friends of the High Bridge, LTD. |
David Yerex, would go on to take pictures of other future eclipses including the total solar eclipse of August 31, 1932 in New Hampshire, and the total solar eclipse of April 7, 1940 in Florida; and was honored by Life Magazine in 1940 with Life Magazine's Picture of the Week Award for the picture of the total eclipse of April 7, 1940, taken by him in Green Cove Springs, FL, just south of Jacksonville.
David Yerex led a colorful life. He lived in Providence, RI upon immigrating to the US in about 1893 and then met and married Annie McGregor Belmore after she immigrated from Nova Scotia to Boston in 1898. They moved to Boston where he was with the firm of E. Chickering. He was noted for his critically important photographs during this period of time. He divorced Annie and moved to New York City in the early 1910s, where he was employed by Underwood & Underwood. Underwood & Underwood was the world's largest producer of stereoview cards. It was during the 20s that the stereoview cards were losing market share and the firm was moving into photo images for the press, much like AP and UPI. He became naturalized as a citizen in 1917 and married a local girl named Helen of Irish descent. In 1920 he had moved to Washington Heights on 160th St. By the mid 1920s he had his own studio in the Bronx, not far from the High Bridge. Perhaps he walked the High Bridge from the Bronx with his equipment that cold wintry day to shoot the picture of the eclipse. During the 1930s he operated a photo studio providing portraits and other photographic services for the general public while he pursued his interest on the artistic side of the field. Around 1940 he moved back to Boston and lived there until his death. Very few of his known works still survive.
Saturday, February 7, 2026
Who was the First to recognize that Light has a Finite Speed and to Measure its Speed?
Galileo tried to measure the speed of light by having a servant take a lantern to a distant hilltop. Galileo was to open his lantern and as soon as the servant saw the light he was to open his lantern. When Galileo saw his servant's lantern he would have a measure of the round-trip-time. But of course, Galileo could only conclude that the light travel time was small compared to the servant's reaction time…i.e., it was very fast.
The first real measurement of the speed of light was made in 1675 by the Danish astronomer Ole Roemer. He kept track of the times that moons of Jupiter were eclipsed.
When he compared these data to calculations assuming uniform orbital motion he saw that the eclipse intervals got a little longer as the Earth moved further from Jupiter and a little shorter then as Earth approached Jupiter in the Earth's annual orbit around the Sun. He realized this was due to the increasing travel time for light. So knowing the size of the Earth's orbit he calculated the speed of light to be 200,000 Km/s.
Roemer's result wasn't very accurate. The first reasonably accurate value was calculated in 1728 by an English physicist, James Bradley.
Because of the Earth's speed in orbit a telescope has to be tilted slightly in the direction of motion toward a star. This is called stellar aberration. By comparing the angles for observations of a star six months apart and knowing the Earth's speed in orbit, Bradley calculated the speed of light to be 301,000 Km/s. Quite close to the current value.
Sunday, January 11, 2026
February 11, 2026 Marks the 222th Anniversary of the Death of Joseph Priestley in Northumberland PA
We last visited the graveside of Joseph Priestley in Northumberland, PA, on February 6, 2004, almost 22 years ago on the commemoration of the 200 years since his death. Priestley is as relevant, if not more so, today than when he died there over two centuries ago, shortly after the birth of our nation.
History Today said, "President Thomas Jefferson of the United States wrote to Joseph Priestley, clergyman and chemist, when the latter was seriously ill in 1801, ‘Yours is one of the few lives precious to mankind, for the continuance of which every thinking man is solicitous.’ Not everyone in America or Britain would have agreed with this sentiment. On the contrary, Priestley’s radical views on religion and politics had made England too hot for him. A mob in Birmingham had destroyed his home, his books, and his laboratory with all his apparatus ten years before and he had felt in danger ever afterwards. In 1794, he and his wife, Mary, emigrated to America, where their three sons had already preceded them. After a horrible seasick voyage of eight weeks against contrary winds, they arrived in thick fog in New York City to great acclaim and went on to Philadelphia, where Priestley was again received with flattering attentions."
On the morning of February 6, 1804, at his home in Northumberland, PA, after dictating final revisions to a manuscript which was a memoir of his life, he famously declared, "That is right. I have now done," and passed shortly after, a death marked by his son and family present. He was buried near his home, and his death followed the years of political turmoil in England that led him to emigrate to America.
If you are interested in seeing the post on our visit to his resting place, click here.
Monday, September 15, 2025
Mystery Island
Every morning, without fail, I find myself at the window, staring out toward an island just off the coast. It’s a place I’ve come to know intimately through years of watching, yet it remains forever mysterious. The island is covered in thick, lush vegetation—a jumble of trees, shrubs, and vines that seem to grow wildly without human intervention. At times, it is covered with a haze, making it appear impenitrable. Sometimes, in the early morning light, I think I can see flashes of green through the canopy, hints of what might be hiding within. But as the day wears on, the island remains silent and still, an untouched patch of the world that calls to my curiosity.
I’ve never seen a boat go there, nor anyone venturing near its shores. Over the years, I’ve watched countless ships and small boats pass by, but none have ever headed toward that mysterious place. It’s as if the island exists in a separate time, separate space, disconnected from the bustling world beyond the coast. The locals around here don’t speak of it much—perhaps because it’s always been there, a quiet sentinel of the sea, or maybe because no one dares to venture close.
Sometimes, I imagine what could be on that island. Could it be uninhabited, left as a secret sanctuary? Or might there be something more—an old ruin, a forgotten relic of a long-lost civilization, hidden beneath the thick greenery? I think about the stories I’ve heard of explorers and adventurers who chase after the unknown, and I wonder if they’ve ever tried to reach it. Yet, as far as I know, no one has succeeded.
Each day, the island’s mystery deepens. The winds shift, stirring the trees and causing shadows to dance on the vegetation. The sun casts a golden glow, making the leaves shimmer like emerald flames. I feel a strange sense of longing whenever I look at it, a desire to step across the water and uncover its secrets. But the distance is too great, and I’ve never seen anyone brave enough to attempt the crossing.
Still, I keep watching, imagining stories for the island. Maybe someday, something will change—perhaps a boat will appear, or I will find a way to explore its hidden depths. Until then, it remains my silent, verdant mystery, just beyond my reach, a quiet reminder of how much of the world’s secrets we’ve yet to discover.
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