Insulated bottle In the United Kingdom 1892, the Dewar vase The Scottish chemist and physicist Sir James Dewar (1842-1923) was the first to produce liquid hydrogen, which was the coldest substance ever produced. To store this cryogenic material at very low temperatures, he constructed insulated boxes from cork, hay or crumpled newspapers, but none of these solutions held the liquids sufficiently. He then discovered and improved the Arsonval vessel. In 1892, he proposed his version of the double-walled glass vacuum flask that bears his name, the Dewar flask. It takes the form of a glass balloon with a straight neck. The narrow space between the two walls is almost entirely free of air, this partial vacuum prevents heat conduction and convection for better insulation. He added silver as a metallic coating to prevent radiation. This invention eliminates any possibility of heat transfer by conduction, convection or radiation. He hired a professional glass blower to make a stronger balloon. In 1898, he used this container to transport and introduce liquid hydrogen to the world. An isothermal bottle to personalize it has become mandatory! You will get that at Gifts-custopolis.com undeniably. Unusual gift for, kdo idea for, customizable gift idea, birthday gifts for, unusual birthday gift.

Isothermal bottle Foreword Practical and lightweight, the insulated bottle has revolutionised our consumption and is now as much a part of our daily lives as a handbag or a telephone. It allows you to take your favourite drink wherever you go and keep it at the right temperature all day long. It has evolved a lot over the years: weight, materials, user-friendliness and design. Introduction "Since the invention of the insulated bottle, the question has never been how to keep hot liquids hot and cold liquids cold". The big question is how it works. The answer is: by using foam or vacuum packaging. There is more to an insulated bottle than meets the eye. What we think of as a rigid container is actually a container within a container, with foam or vacuum between the inner wall of the outer container and the outer wall of the inner container. Foam containers keep cold liquids cold and vacuum containers keep hot liquids hot. This method has proven to be very effective since the early 20th century and that is why insulated bottles are popular with anyone who needs or wants to drink liquids on the go, such as athletes, travellers, campers and hikers, or just the average busy person who is thirsty from time to time and has prepared their hot or cold drink in advance. Many baby bottles are also insulated." An isothermal bottle to personalise is now essential! You will find it easily at Gifts-custopolis.com. Unique gift to personalise,original kdo idea, original gift photo,photo gift idea for, little photo gift...

13th century. Mechanical clocks began to develop. More than thirty testimonies are quoted from all over Europe at the end of the 13th century. In these texts we find the purchase of iron and weights and the acquisition of expensive clocks in monasteries, cathedrals and princely residences. These prices were often considerable: six marks for the clock of the monastery of Colmar in 1278, thirty pounds for that of Canterbury in 1292, fifty pounds for a simple repair or transformation of the clock of the cathedral of Sens in 1319. Gradually, the mechanical clock, whose movement is permanently maintained by a motorised weight, replaced the boring water clock that had to be constantly cleaned and filled or emptied. It seems that these early clocks - like the water clocks - were first intended to strike a particular time (e.g. alarm clock) and a little later to strike different times of the day; these clocks were "blind": they had no dial! The striking mechanism was operated by one or more pins on a wheel of the mechanism. This transfer of technology from hydraulic to mechanical power enabled the original purpose of the clock to be retained: the striking of a precise hour; this invention has therefore remained practically anonymous. It was not until a little later, in 1336, that an important innovation changed the history of clock-making: striking clocks. A clock with a reproduction of the top 10 works of art are unusual artwork ideas,cute artwork gift ideas , perfect to buy a artwork gifts and unusual to personalise artwork gifts, special artwork gift ideas, to personalise artwork gifts for…best artwork gifts for… unique artwork gift for…

Mechanical clock A mechanical clock is a time-measuring instrument that tells the time by an originally entirely mechanical action. It is based on the combination of three functions: a driving weight for the rotary movement, a regulator such as a balance wheel and a display (a graduated scale and hands). The mechanical clock is the successor to the various horologia. The Romans, and before them the Egyptians and Greeks, had already developed time-measuring instruments that demonstrated great astronomical knowledge. The invention of the mechanical clock can be placed around the 1300s and appeared in Western Europe at the end of the 13th century. Originally, it was a weight motor and foliot. A foliot is a vertical pendulum that controls the energy supplied to a wheel by a weight. The motion is then transmitted to gears that drive the movement of the hands. A weight suspended from a rope provides energy to the machine, while a system of rods and foliots periodically interrupts the fall of the weight. By placing the weights at each end of the foliot, the rhythm of the back and forth movements can be adjusted. The low precision of this mechanism, from 1 to 2 hours of deviation per 24 hours, renders the minute hand useless, and it will undergo a long evolution and an important diversification over the centuries. Having a clock as a birthday gift with a decoration dedicated to a specific birthday, 20 years, 60 years or more, is fun: unusual gifts for birthday, best anniversary gift ideas and unique anniversary gift ideas for an event that is celebrated every year and that will remain unique.

Others see in them the mark of the Templars or the Freemasons who used these containers to conceal compasses, mallets, small trowels, crosses and cords. "In any case, the existence of jewellery boxes is clearly attested as early as ancient Rome where, in families, the woman was the custodian of the particular seal of the house which served to seal the cases containing the precious objects. Indeed, as a Ladies' Manual from 1833 reminds us, precious stones and gold jewellery must be perfectly protected from humidity and preserved from any dirty or greasy contact: "It is advisable to rub them from time to time with a piece of white or chamois leather"and then place them in the "jewellery box". In French, the word "écrin", synonymous with "boîte à bijoux" (jewellery box), is originally derived from the Latin word "crines", meaning "hair", and was used to preserve souvenirs made of hair. Later on, the use of Jewellery boxes was extended to include all the useful and necessary accessories for the embellishment of the head: earrings, necklaces and combs. Nowadays we add bracelets, chains, rings, etc. " The item we present to you is made of faux leather in a rectangular format to escape the standardisation of jewellery boxes, "Made in China". You have the opportunity to find decorations for almost every imaginable occasion: Mother's Day, Valentine's Day, birthdays, and of course we can apply your photo on the lid of this jewellery box. Just choose the jewellery box with the desired decoration. A jewellery box as a birthday gift, an original birthday gift idea is already very good, but with a work of art as a decoration on the lid it becomes totally admirable, birthday gifts for an art lover!

The privilege of the aristocrats at the beginning and for hundreds of years, the popularisation of jewellery boxes did not begin until the beginning of the 19th century following the industrialisation of many manufacturing processes which became factories and of course production lines. Thus, more modest families could afford jewellery boxes to preserve jewellery and other precious items passed down from parents, grandparents, great-grandparents or any other family member in a more permanent way. However, some objects inherited from a distant and not always shameful past are frowned upon today, such as ivory jewellery. It should also be pointed out that there are simple jewellery boxes without compartments and other jewellery boxes with many compartments, of course the prices vary greatly. There are also musical jewellery boxes. Today we find music boxes at all prices, music boxes that have become gadgets that many people know. Music boxes were the only instrument that allowed you to listen to a melody if you were not a musician! The music box had its heyday in the early 19th century. The object we offer is made of faux leather in a rectangular shape to escape the standardisation of jewellery boxes, "Made in China". You have the possibility to find decorations for almost every imaginable event: Mother's Day, Valentine's Day, birthdays, and of course we can apply your photo on the lid of this jewellery box. Just choose the jewellery box with the desired decoration. A jewellery box with a gold coloured anniversary label! This is a very nice gift for an unforgettable birthday, original birthday gift idea perfect gift for someone you love.