Barometer Planet » Antique Barometer

Howard Miller Barometer

admin — Sun, 04 Oct 2009 12:17:37 +0000

Howard Miller is one of the largest and oldest companies that produce quality barometers. The Howard Miller barometer has always been a reliable and useful device to use in even the harshest conditions. The Howard Miller Barometer combines quality with a nice old-school design to make up for a great barometer. The Howard Miller is a very wide spread brand across barometer owners as any barometer owner dreams of owning a Howard Miller Barometer at a certain point in their life.

You could easily get at any time a Howard Miller Barometer for ‘cheap’ at Bizrate – click this link. That’s not the only place where you could get a Howard Miller Barometer but you could also try eBay or Amazon as those are the best places to get a cheap deal. On a side note you should try scoring some deals on Craigslist – you might get lucky and hit the jackpot with a cheapish Howard Miller Barometer.

howard miller barometer

Above you have pictured a Howard Miller Barometer – a masterpiece of technology and design. The Howard Miller barometer is famous for it’s reliability and good results under all types of weather conditions. All in all, the Howard Miller Barometer is an excellent choice if you’ve got the money to invest in such a tool.

The Goethe barometer

admin — Wed, 30 Sep 2009 18:47:54 +0000

Johann Wolfgang von Goethe (28 August 1749 – 22 March 1832), was a German writer and thanks to that a very influential person. Goethe’s influence spread across Europe, and for the next century his works were a major source of inspiration in music, drama, poetry and philosophy. Goethe is considered by many to be the most important writer in Germany and one of the most important thinkers in Western culture as well. Early in his career, however, he wondered whether painting or writing might not be his true vocations; late in his life, he expressed the expectation that he would ultimately be remembered above all for his work on colour. Goethe popularized the Goethe Barometer using a principle established by Torricelli (1608-1647). According to Hegel, ‘Goethe has kept himself busy a good deal of his time with meteorology; barometer readings interested him particularly. The main thing is that he gives a comparative table of barometric readings during the whole month of December 1822, at Weimar, Jena, London, Boston, Vienna, He claims to deduce from it that the barometric level varies in the same proportion not only in each zone but that it has the same variation, too, at different altitudes above sea-level’ In 1793 Johann Wolfgang von Goethe crafted a special “weather glass”, which was discovered only after his death many years later in his Wiemar laboratory: a pear-shaped blown-glass vessel, with a raised spout like an elephant’s trunk, and which dripped water at the time of approaching rains. Called the Goethe Weatherglass Barometer, this fascinating device was widely used for many years to reliably observe changes in atmosphere pressure but it was eventually replaced by mercury barometers or aneroid barometers, and thus sunk into oblivion. The Goethe Barometer is firstly prepared by immersing the glass vessel under water, on its back, allowing it to fill about three-quarters with ordinary water, when returned upright, an air pocket forms in the top of the vessel, and the spout fills about half way with water. As air pressure lowers with the approach of a storm system, the air pocket inside the Goethe barometer expands, pushing water up the transparent glass, and water then drips out and down the instrument, where it collects on a small attachment mounted on the same provided wood plank wall-display on which the Goethe Barometer is also mounted. As air pressure increases with clear and cloud-free weather, the normal atmosphere pushes the water down and compresses the air pocket, and no water is observed to drip out. Compared with the other barometer instruments, the Goethe Barometer is simpler to use.

How to read a barometer

admin — Wed, 23 Sep 2009 09:20:07 +0000

The most important instrument used for weather forecasting is the barometer, but surprisingly only a handful of people know exactly how to read a barometer and interpret its measurements. A barometer does not only indicate present weather conditions but forecasts probable weather conditions 12 to 24 hours in advance.However it’s not that simple to read a barometer, taking into consideration the fact that the wind changes its direction constantly. A “rise” in barometric pressure must be considered in relation to the former reading and the same principle applies to a “fall”. In fact, a barometer is most useful if it is read only once a day, preferably at the same time of the day – 7-8am or 8-9pm are good times to do barometer readings – for reasons which we’ll get to later. Twice a day is also fine, but it’s really the 24 hour changes which are most significant for weather forecasters, so learning how to read a barometer is of great importance at this point. Sometimes the readings of the barometer can appear inaccurate saying that there is going to be rainy but in fact it’s going to be sunny. That happens because the weather we experience is caused by the interaction of air masses and pressure cells, which move fairly slow over the earth’s surface. Considering only air pressure varies, the extremes are high pressure cells and low pressure areas are the fronts, these two being the boundaries between different air masses. Between these extremes air pressure will vary fairly consistently, and we have a pressure gradient between the two extremes. So once the center of a low has passed, the pressure will gradually rise until the center of the following high passes through.

So when you read a barometer the needle will gradually rise up the scale from day to day. In most cases, a high pressure cell means calm, clear, sunny weather, and as the needle moves up the scale, the increase in pressure is suggesting fine, or “fair” weather is on the way. Similarly, as the high passes over the daily change in the needle’s position will show a decrease in the air pressure, and suggests that if this continues you will experience a period of low pressure. Of course, as in most things to do with weather and life, it’s not quite that simple to read a barometer, which means that although the pressure changes recorded by your barometer have some predictive value, they won’t always be right. For example, if the center of a high passes at a certain distance from where you’re located, you may not experience the fair weather that your barometer predicted before the pressure, and the needle begins to fall. Another general rule of thumb in “how to read a barometer” is that very high pressure readings may indicate windy conditions to follow. The reasoning behind this is that an extreme reading usually means a high pressure gradient to the next low, and high pressure gradients mean strong winds. This rule doesn’t apply in quite the same way to very low pressures. While the pressure gradient will certainly be high, the low is actually the focus of the winds, and unless you happen to be under the eye of a hurricane, the strong winds have already arrived. But you can, if you know how to read a barometer ,turn it into a very useful forecasting tool, but you will need to keep records of the weather to do so. Apart from pressure changes, you can record wind direction, wind direction changes, cloud cover and type of clouds, and the occurrences of rain, snow or thunderstorms.

So let’s recap on what you need to know about how to read a barometer:

Get a regular mercury barometer and start measuring the atmospheric pressure around you by simply measuring how high the mercury column goes up or down. The way you’re going to measure it is from bottom to top using a simpler ruler, keeping in mind that under regular atmospheric pressure the vacuum at the top of the barometer is at almost 30 inches (29.92 to be more precise). When the mercury column drops below that point, we’re experiencing a drop in atmospheric pressure and that means we’re going to get bad weather. This thing works viceversa as well so if the mercury column rises you can expect nicer weather. All in all learning how to read a barometer is a good thing if you’re an outdoor enthusiast and want to know how to plan your trips.