Who Invented the Spiral Notebook?

Who Invented the Spiral Notebook?...

The established facts about spiral notebooks show it was first mentioned in the October 1934 issue of Popular Science. However the magazine did not say who the inventor was. Early accounts also called it the memorandum notebook. The Binding Aside from spiral, there are many types of binding used. These include clasp, pressure, comb and padding. Some manufacturers combine these methods in one notebook. The binding affects the way a notebook is opened and how it is linked to the covers. In spiral notebooks for example, it is possible to remove the pages. In other binding methods you cannot remove the paper without damaging the notebook itself. One of the well known facts about spiral notebooks is that the covers are almost always thicker than the pages inside. The way the pages are held affect the cost of the notebook itself. Most of the time, the spiral types are cheaper. There are hard bound notebooks with a sewn spine. Some notebooks also have perforations that allow a user to take out the page more easily. Other designs allow for the pages to open in a flat manner, but others drape. Variations Some notebooks are fastened by disc or rods, and in these cases, the pages are modified to fit the binding. The ring bound types are fastened together using threads or curved prongs. The disc bound notebooks have teeth that grasp the raised border of each disc. One of the known facts about spiral notebooks is that their pages cannot be rearranged as easily as these other types. Appearance Spiral notebooks have lines on them where one can write on. However those used for drawing don’t have any. Other notebooks have designs on the pages themselves. The covers are...
Who Invented Chalk?

Who Invented Chalk?

Your first encounter with chalk might have been in the classroom where you often see your teachers use them to write on a chalkboard. The most familiar form of chalk a lot of people have come familiar with is made of slender sticks around a quarter of an inch thick and about three inches long. You might even have come to wonder who invented chalk. Who Invented Chalk It might come as a disappointment to find out that no one can tell who invented chalk. Chalk is readily found in nature and has been used as a tool for drawing and writing for quite a long time. Drawings that date even to the prehistoric times have been discovered by archaeologists. The earliest chalk writings/drawings have been found in caves. As time went by artists from various countries used chalk to make drawings and sketches. Their work was protected using shellac or any comparable substance. For the convenience of these artists, a major innovation was introduced – chalks shaped into sticks. Even though chalk artists can’t be credited as the ones who invented chalk, their need introduced an innovation that would last for centuries. Making Chalk In the same way we don’t know who invented chalk, we also don’t know who invented the method to make chalk into sticks. What we know is that the method starts by grinding natural chalk into a very fine powdery form. Water is then added along with clay and various color pigments depending on what color of chalk you want to make. The clay actually acts as a binder of some sort. The mixture will initially look something like putty that would be rolled and shaped into cylinders and then would be left to...
Who Invented Pi?

Who Invented Pi?

Based on historical facts about pi, the Egyptians were the first to discover and use it. The Great Pyramid measured 1760 cubits with a height of 280 cubits. The equation 1760/280 is equal 2 x pi. Note that this is archaeological evidence; there are no specific Egyptian texts that specifically mention pi. An Overview of Pi History The history of the pi is usually divided into three eras. The ancient period was the time it was studied in geometric terms. The classic era took place in 17th Europe following the invention of calculus. The current one is the digital period, where computers are used to analyze and compute the data. The Susa math tablets (c 2000 BC) can shed light on some facts about pi. These were set down in cuneiform and discovered in Shush, Iran. There it is said that the ratio of the circumference of a circle compared to a hexagonal perimeter is 1:0.96. This is taken by some experts as a pi=3.125. Most of the ancient civilizations located an area by multiplying a square of the circumference by 1/12. The Ahmes Papyrus While no Egyptian texts state their use of pi, some math experts suggest otherwise. The Ahmes papyrus (or Rind papyrus) seem to indicate some awareness on their part. It was composed around 1820 BC. It is mostly concerned with problems about locating the circle’s area from the diameter. When studying the facts about pi, it is about multiplying the diameter by 8/9. This is the p/4. From the text in the papyrus, the value is at least p= (256/81) =3.1605. The Moscow Papyrus There is another Egyptian papyrus called the Moscow papyrus (where it is kept). It deals with mathematical problems. One problem is...
Who Invented School?

Who Invented School?

A lot of people hate school. But lots more love it. It’s been around providing educational foundation for people. Both lovers and haters of it probably wonder who invented school. Or who started the idea of school? Byzantines or Hellenists? There are some suggested answers on the Internet, but they are far from being accurate about who invented school in particular. Most of them point to the Byzantines. They were said to be the first people on earth to come up with the idea of a school system. These people continued the Roman Empire in the Middle Ages. They were heavily influenced by the Greeks, especially in language. The Greeks were so dedicated in seeking knowledge. They had been known for this long before the Byzantines thought of a school system. Thus, some say they were the ones who invented school. But what Greeks had was a form of discipleship, not a school. There was an itinerant teacher with disciples. They traveled to places. They seldom met in permanent places. They conducted lectures in different locations and some local folks sometimes joined in to listen. There was no formality. So they were not the ones who started the idea of school. The Byzantines liked the Greek idea of teaching a following, but they preferred to have it in an enclosed permanent area and with a system. The Greek philosophers and their disciples talked about anything randomly under the sun. They often sought meaning in life. The Byzantines wanted more specific subjects dealt with at a time. Like Mathematics, Language, Philosophy, Religion, History, and the like. Thus, they’re considered the people who invented school. Who’s Horace Mann? To give a specific name to answer who invented school, some mention Horace...
Who Invented the Pencil Sharpener?

Who Invented the Pencil Sharpener?...

A look at the history of pencil sharpeners shows that the Frenchman Bernard Lassimone was the first to get a patent for pencil sharpeners in 1828. Following his invention, other designers made improvements and refinements. The Early Pencil Sharpeners Pencils had been invented before the sharpener and people used knives to sharpen them. It was a tedious process and the result was uneven. After Lassimone’s invention, Therry des Estwaux came out with a mechanical sharpener in 1844. It took a while before the devices were accepted. But by 1865 companies were already manufacturing pencil sharpeners. A company called Eureka filed a patent for a small sharpener sometime in the mid 1860s. By the 1880s, several companies started producing them in larger numbers. One of the most well known companies in the early history of pencil sharpeners was Eagle Pencil Company in New York. A Look at Early Pencil Sharpeners From the 1880s to the early 1900s, many kinds of pencil sharpeners were developed in Europe and America. The electric sharpeners came out around 1917, but other types were produced. 1916’s New Era Pencil Sharpener resembled a plunger. The pencil would be placed inside the device and press it again and again. This process sharpened the blade. Another unique device was the Babock Duplex Pencil Sharpener. The device was patented in 1900 and came with a rotary of 6 blades. The history of pencil sharpeners shows that it was operated in the following manner. When the pencil was inserted, the blades would rotate around it. The right hand operates the crank that rotates the blade. The left hand operates the metal bar. One of the earliest sharpeners was invented by Guhl and Hurbeck in 1897 in Germany. It was called...
Who Invented the Chalkboard?

Who Invented the Chalkboard?...

Mr. James Pillans is regarded as the inventor of the chalkboard (or blackboard). He was the Headmaster of a high school in Edinburgh, Scotland. However, the experts on the history of the chalkboard aren’t sure when he invented it. Blackboard and Chalkboard The word chalkboard is used mainly in the United States. It started to be used around 1935-40. In other countries and regions, blackboard is the term employed. The word blackboard has been in use for a much longer period. Records show it was being utilized as far back as 1815. Spread of the Chalkboard Exactly how Pillans conceived of the chalkboard isn’t clear. But it’s known he was using it to teach geography in the school and that he was using a chalk. The device was first employed in the US in 1801. A teacher at West Point named George Baron used the chalkboard for his math class. However the history of the chalkboard began, its use became widespread. This is understandable. Prior to 1801, teachers couldn’t present their concepts and ideas in a visual manner. In most classes, students employed slates. The material was made of wood and covered with black grit. Other slates were made of porcelain. It was where students used to write their lessons. Because there were no chalkboards, the teaching process was tedious. If a teacher wanted the students to solve a math equation, they would go to every student. The instructor would write the math problem on the slate. To make matters worse, not all students had slates. The first school in California was inaugurated in 1846. Because the students and teachers didn’t have slates, the students had to write their answers on their hands. As the history of the chalkboard...
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