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COG PLANTHOPPER
The small planthopper pictured below is found throughout Europe, Russia, China, and Northern Africa. First described in 1839, it is a winged insect with more than 1,000 relatives. The nymphs are unique to their parents in a manner not found elsewhere on planet Earth. What is that unique genetic feature or attribute for this quarter-inch-long insect? Hint: The unique genetic mechanical feature is the only known example found in nature but may be found in every mode of transportation used by humans.
Answer
Some will argue that man has often invented things having closely observed nature. For example, it might be argued that observing nearly round rocks rolling down a hill provided the idea for the wheel. The Wright brothers are said to have observed how birds twist their wings and tail feathers to control their flight when developing controls for their aeroplane.
While the human concept mechanical gearing is more than 2,300 years old, Issus Coleoptratus nymphs (pictured in the question) have incorporated biological mechanical gearing in their hind legs for perhaps millions of years. It is the only known example of biological gearing. Gearing is defined as evenly-sized teeth or cogs cut into a matching pair of straight or curved, interlocking, moving, surfaces in such a manner as to synchronize their motion as they operate.
Investigated by biologists Malcolm Burrows and Gregory Sutton from the University of Cambridge in the U.K. in 2013, the gears force the nymph’s legs to each exert equal force when the nymph hops among undergrowth leaves and branches at speeds as high as 8.7 miles per hour. The gearing action ensures the insect jumps straight ahead and not off-course or starts spiraling only to miss the targeted landing spot. The x-ray images below show the 80 micrometer wide teeth that incorporate fillets to reduce wear at the base of each cog or tooth similar to human-designed mechanical gears.
Each gear cog is also asymmetrical and curved in one direction only as the interlocking action between the teeth under power is in one direction only. Most man-made machine gears, such as those in transmissions and steering systems are symmetrical due to the need to rotate in two directions.
Interestingly, should a tooth break, when the nymph molts to a larger size, a replacement tooth is grown as each molting increases the size of the gears in proportion to the insect’s increasing mass and leg length. However, as a nymph becomes an adult in later molting events, the gearing disappears giving way to a simple friction interface between the two leg bones. This evolutionary change no doubt eliminates the need to grow back broken cogs during adulthood. The larger mated surface contact areas of adult leg bones provide the same control of landing location. Burrows and Sutton were able to observe, using high-speed video, the mechanical action of the Issus Coleoptratus’ legs by electrically stimulating one of the nymph’s leg muscles causing the pair of legs to quickly extended with synchronized force and motion.
YORK LYN & YORKLIN & YORKLYN
Answer
We recently uncovered what is probably the best documentation for how the name Yorklyn came about. As early as 1905, the phrase “first draft of history” was cited in text, but it was Phil Graham, Washington Post owner and publisher, who made the phrase “The First Rough-draft of History” famous by using it in various speeches and writings. While newspapers are not always accurate in published information, they do provide a foundation upon which history can be documented and are effectively “the first rough draft of history.” The newspaper clipping shared below, from the August 11, 1873, Wilmington Daily Commercial newspaper explains how Garrett’s daughters came to suggest Yorklyn.
The “Marshall’s paper mills” referred to above, while it was a single mill, references Thomas S. Marshall’s Homestead Mill at the joining of the east and west branches of the Red Clay Creek in Kennett Township, PA. This is the original Marshall paper mill before Israel and Elwood Marshall, Thomas S.’s sons, purchased the burned-out Clark woolen mill to convert it into a modern paper mill in 1890. William T. Moore opened the U.S. Post Office at Yorklyn Station on June 13, 1873. Thus, the article above may be considered a “first rough draft of history’ in its accuracy!
The Wilmington Daily Commercial was published from October 1, 1866, until March 31, 1877. More commonly referred to as the Wilmington Commercial, it became the first daily paper published in Delaware. It was founded by Howard Jenkins and Wilmer Atkinson, who became Wilmington residents specifically to publish a daily newspaper. Selling their paper for 2 cents a copy initially, they used steam-powered presses to quickly print and distribute the latest news and gossip. Jenkins & Atkinson were among the first to sell newspapers on Delaware trains, thus expanding their circulation well beyond Wilmington’s city limits.
On January 3, 1867, Jenkins & Atkinson published a weekly edition titled Delaware Tribune. On September 4, 1871, the first issue of Every Evening was published by the Wilmington Commercial’s former city editor William T. Croasdale, who had struck out on his own to publish a competing newspaper. The two papers eventually merged to become the Every Evening and Commercial on April 2, 1877, with only the April 1, 1877, issue being named Every Evening, Wilmington Daily Commercial. Eventually, through additional mergers of Wilmington newspapers, the Evening Journal merged with Every Evening, Wilmington Daily Commercial. Over the decades the Evening Journal absorbed other Wilmington area newspapers, thus becoming Delaware’s prominent newspaper. The Evening Journal is published by Gannett Company, Inc., which, as of November 2019, is the largest newspaper publisher in the U.S.
WORKING ON THE RAILROAD
In doing some recent research, we came across the image below from 1935. While most railroads did something similar, the photo is for the New York Central Railroad. What service is the worker providing? As a hint, the location is the entry to a passenger station located in the distance.
Answer
The image above is of the work pit of a railroad “hot box” inspector! Passenger trains, as well as freight trains coming into the station complex, had to slow sufficiently for the switching ahead. They had been running at a much higher speed prior to coming to the location pictured, which meant wheel bearings had been operating at higher speeds, creating more friction. A bearing without sufficient lubrication would be smoking if not on fire, and it was the inspector’s job to spot the smoke/fire from a “hot box” and report it so that the train could be stopped and the problem dealt with.
Depicted in the image below is a typical railroad friction bearing such as was used for locomotive, freight, and passenger cars during the 1800s and into the mid-1900s before roller and ball bearings saw widespread use. The olive part is the rotating axle attached to the railroad wheel. The yellow is the mechanical bearing made of brass. Under the axle and contained within an iron casting box-like structure with a door at the end is the waste packing, which amounts to cotton and wool materials in contact with the underside of the olive axle and saturated with oil. The turning axle picks up a thin layer of oil on the axle’s cylindrical surface and carries the oil as the axle turns to the contact area between the yellow bearing material and the olive axle. That thin layer of oil molecules keeps the axle and bearing from direct contact by forming a thin oil sheet between the two. Without metal-to-metal contact between the bearing and axle, there is little heat generated, offering a low-friction interface between the turning axle and stationary bearing.
Should oil in the packing become depleted, the oil film on the axle is reduced, and metal -to-metal contact between the bearing and axle generates heat from increased friction. With sufficient heat, the oil begins to smoke, and in an extreme situation, the oil can catch fire. As the bearing assembly is within an enclosure resembling a rectangular box, the term hot box came into use when a bearing was found smoking.
$2.7 MILLION TIME PIECE
Banking records as far back as 1860 show Caleb Marshall as president of the Real Estate Bank of Delaware, which was located in Newport, DE. Caleb is the older brother of John Marshall (Kennett Bank President), and together they established an iron rolling mill on the Red Clay Creek in what is now known as Marshallton, DE. In late 1864, Franklin Q. Flinn was elected president of the bank as Caleb and his family were moving to Philadelphia to establish the Penn Treaty Iron Works for the manufacture of terne plate (early form of galvanized iron for which Caleb was issued patents). The $1 bill shown below, issued by the Real Estate Bank of Delaware, has Caleb Marshall’s signature as president. That is William Penn pictured and not Caleb Marshall.

Above is an image of a $10 National Bank of Kennett Square bill issued April 26, 1921, with T. E. Marshall’s handwritten signature as president. Images of $10 and $20 National Currency bills (below) with T. Clarence Marshall’s lithograph-printed signatures show the bank’s name change to National Bank and Trust Company of Kennett Square. Over the 55-year life of the national currency program, National Bank of Kennett Square issued nearly $2.7 million in 15 different types and denominations of national currency. It is estimated that due to the higher-value denominations issued in later years, when TE and TC Marshall were presidents, that more than half the dollar value of $2.7 million total issued in National Currency by Kennett Bank displays a Marshall signature!!
AUTOMOTIVE BODY DESIGNS
We recently ran across an image that called our attention to 21st-century automotive body designs. If one examines 23 current brands of automobiles offered to the American driver, and we imagine equivalent models all painted in light gray, there’s not really a lot of diversity in basic appearance, as the image to the right attests. Images of individual vehicles for the composite image were digitally “painted” light gray as the color is not offered by all manufacturers.
According to Kit Foster’s The Stanley Steamer: America’s Legendary Steam Car, in April 1898 the Stanley twins contracted Currier Cameron Company to construct the wooden bodies that were then sent to the Shields Carriage Company for lacquer application and finishing. Both businesses were located in Amesbury, Massachusetts, and shared common organizational roots. Locomobile assembled their cars in Watertown, which required the finished bodies to be shipped in boxcars by rail between the two cities.