The Invention of the Refrigerator free essay sample

Hello! Today I am going to talk you about the invention of the refrigerator. I chose this topic because I think we all cant imagine our lives without food, so we also cant imagine our lives without the refrigerator. Im going to present you this topic with the help of power point and I really hope that in the end of my presentation you will know something more about refrigerators. The invention of the refrigerator The conveniences we enjoy in our homes are the product of many machines we use every day to make our lives easier. We must be aware that it is only because of dedicated inventors that have spent years of their life, searching of a way to make all this possible. Were talking about machines such as the refrigerator, for example. The idea of a machine that would be able to prevent food spoilage has actually been around for a very long time before the invention of itself. We will write a custom essay sample on The Invention of the Refrigerator or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page It was only in the late 1834 that Jacob Perkins, a young inventor after making a design persuaded John Hague to realize his idea, and like that the first kind of refrigerator was born. Early attempts In the beginning, there were made ice houses   to provide cool storage for most of the year. These ice houses were placed near freshwater lakes or packed with snow and ice during the winter. As we can see in Thomas Jeffersons diary, which chronicles the process of maintaining the ice house at the Monticello Estate, this processes were very complicated. Every winter, Jefferson brought more than 60 wagonloads of ice from the Rivanna River to keep his ice house filled. The ice house was a huge source of trouble, just by the expense of keeping it stocked. While Jefferson was busy keeping his ice house stocked, Benjamin Franklin working with chemist John Hadley in 1758 was leading us to the invention of the refrigerator. They were experimenting with the effects of evaporation using a thermometer. With some methods they were able to drop the thermometers temperature well below freezing. Perkins and his impact In 1834 a young inventor called Jacob Perkins build the worlds first refrigerator and invented a legal patent for refrigeration using vapor-compression. Soon, what was meant to be just an experiment became something fit for commercialization and other inventors tried to develop Perkins patent. In 1856 following Perkins success,  James Harrison, an immigrant from  Scotland   living in  Australia, developed an ice making machine using  ammonia  and an ether compressor. It was used in the meat packing industries of Geelong, Victoria. Few years later, Carl Paul Gottfried Linde, a  German  engineer developed refrigeration and gas separation technologies. Carl Paul Gottfried Linde (better known as Carl von Linde)   was working in the way of develop new refrigeration cycles. In 1892 Lindes research drove into the area of low temperature refrigeration and in 1894 he started work on a process for the liquefaction of air. In his later career Linde began working on a technique to obtain pure oxygen and nitrogen based on the fractional distillation of liquefied air. By 1910 Carls son Friedrich had developed the Linde double-column process, variants of which are still in common use when it comes to air separation in three main gasses: oxygen, nitrogen and argon. CONCLUSION In the 1920s and 30s, consumers were for the first time introduced to freezers – that was the time when the first electric refrigerators with ice cube compartments came on the market. Even so, the mass production of modern refrigerators didnt get started until after World War II. Few decades later when innovations like automatic defrost and automatic ice makers first appeared, it became clear that more energy-efficient refrigerators are needed, if not, there will be a huge environmental damage. The conclusion soon leaded to the elimination of chlorofluorocarbons in refrigeration sealed systems and the introduction of energy-efficient refrigerators. Today, the refrigerator is Americas most used appliance, found in more than 99. 5% of American homes. We are all aware that if this invention had never been invented our lives would be much more complicated. For example the food spoilage would be 5 or 6 times quicker. Besides that, we would be still forced to store our food in ice houses. With this conclusion I end my presentation. I hope you enjoyed and thank you for your attention. =)

Writing a Good Essay - How to Write a Good Essay For Scholarship Application Samples

Writing a Good Essay - How to Write a Good Essay For Scholarship Application SamplesThere are several methods on how to write a good essay for scholarship application samples. They vary depending on the field of study you are applying for.Write an essay on your own is quite a bold move, especially if you have not written an essay before. However, it does not mean that you should be overly choosy about the material you use. With regard to college scholarship samples, you can use books as a base. However, a lot of people will use textbooks as well.Always have at least basic information about the subject matter of the essay. It should also be concise and to the point. You do not need to go into any extensive details. Give emphasis to key ideas. This way, it will not take too long for the reader to absorb the meaning of your essay.You can choose to write an essay based on current events. However, it is highly recommended that you avoid using current events, as it would be too long and te dious. It would be best if you stick to something that involves the history of the essay.Make sure that the topic of your essay is something that you feel comfortable with. Your personal experiences are bound to be relevant. With this being said, try to include at least one personal experience in your essay.Go to your local library or bookstore. Browse through books and choose those that have been written by famous writers. This way, you will have an idea about how to write a good essay.The best way to get help with writing essays is to look up different aspects of the essay. Look at sample essays online as well.This way, you will be able to know how to write a good essay on your own. When you want to improve your writing skills, you will have to take extra efforts in your efforts.