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Thursday, April 26, 2012

Antiques-Wood Basics

Antiques-Wood Basics


Oak, mahogany, walnut, pine, rosewood, maple, elm; you may have some or all of these woods in your home. But, do you know how to tell the difference among them? In this month's column, we'll talk about the different kinds of wood that are regularly seen in antique furniture and some common decorative treatMents.

Antiques-Wood Basics

Antiques-Wood Basics

Antiques-Wood Basics


Antiques-Wood Basics



Antiques-Wood Basics

The Basics
Wood is hard or soft. When I say hard, I mean that the wood is dense, whereas, a soft wood is supple. A good trick to tell the difference between hard and soft wood is that if you press your doesn't increase into a soft wood such as pine, it leaves an indentation. But, this does not happen with a hard wood such as oak.

Wood is coarse-grain or close-grain. In coarse-grain wood, the age rings in the wood are getting to part, giving it an unevenappearance. In close-grain woods, the age rings in the wood are very close together, giving it a smooth, delicate appearance.

Sometimes, wood is stained. Lighter woods such as oak, elm and maple can be stained to resemble a darker mahogany or rosewood.

Some woods (mahogany, rosewood, burl walnut) are perceived to be more valuable than other woods (elm, maple, spruce). The reason for this is availability. Woods that need to be imported are more expensive than home-grown woods. Woods that are abundant proteins are not as expensive as woods that are scarce.

Oak
Oak is a coarse-grain hard wood found in Europe and North America. Starting in 17th century Europe, oak was used to make furniture found throughout the home. There are several varieties, including red oak and whiteoak. Young oak is pale in color. But, over time and with polishing, oak darkens into a rich brown color.

Mahogany
Mahogany is a close-grain hard wood native to northern and central South America and the West Indies. Mahogany was a popular choice in England during the mid-18th century for fine furniture making. It is a dark red color sometimes, however, it is dark brown. Red mahogany is found in the West Indies and brown mahogany is native to South America. Mahogany furniture continues to be desirable today.

Rosewood
Rosewood is a close-grain hard wood indigenous to India, South America and the West Indies. Rosewood is named for the rose scent that releases when it is cut. Occasionally, I find that people confuse rosewood and mahogany. Both woods can bered in color. However, when you look closely at rosewood, you'll see the end black (and sometimes white) rings that are not present in mahogany. Another trick to tell if an item is rosewood is to pick it up. Rosewood is a very heavy , heavier than mahogany wood. In the 17th century China, rosewood was a popular choice for fine furniture makers. As well, in 19th century Europe, it was used to construct better-quality furniture for fine homes.

Walnut
Walnut is close-grain hard wood found in Europe and North America. The color varies from light to very rich golden brown color and it is not uncommon to find walnut stained to look like mahogany. Sometimes, disease leads to the unexpected. Burl walnut, the most prized form of walnut, results from a disease that attacksthe tree causing a beautiful scrolled, close grain. These days you see the look of burl walnut replicated in the plastic interiors of some higher end cars.

Pine
Pine is a soft wood blades, knotted with a wide, straight grain. It grows in Europe and North America. Pine was often used in furniture intended to be painted. Everyday furniture-kitchen tables and chAirs-were often made from pine.

Maple & Elm
Maple and elm are coarse-grain hard woods found in North America and Europe. They were frequently used in utilitarian furniture. Often a veneer of a finer wood was applied to these woods.

Veneers
Veneering is a technique where a very thin sheet of a more expensive wood is glued to a less expensive wood. Using less expensive woods suchas elm and maple and adding a more expensive mahogany or walnut veneer allowed furniture makers to provide furniture that was affordable for a larger clientele. You may hear an antique dealer say; "This table is walnut on maple." The dealer means that the item has a walnut veneer and underneath the actual item is maple. In walnut on maple table is less valuable than a solid walnut table.

How do you tell if your furniture is veneered? Look at the edges of the piece. If you see what appears to be a seam, it is veneered. On the other hand, if the edges of the piece are seamless, it is solid.

From the Early 17th century veneers were hand-cut, so they could be uneven. But, in the 19th century veneers started to be cut by machine. This allowed the veneers to be cut very thin andeven. Depending on the way the wood is cut, veneering produces different effects. Butterfly occurs when two opposing veneering end grain veneers are diagonally cut from a branch. They are applied to mirror each other.

Marquetry Parquetry Inlay//
Marquetry is a technique where various kinds of wood are applied to a surface to produce a picture. Flowers and birds were often the subjects. Exotic woods such as ebony and satinwood, tulipwood were frequently employed.

The difference between marquetry and parquetry is the subject matter. Parquetry is a veneer that uses geometric patterns. Nowadays, you see it in parquet hardwood floors and ornate chess and backgammon boards.

Inlay is a decorative treatMent where materials other than wood are cut into a design. Inlayswere often made of bone, ivory, mother of pearl, brass, tortoise shell. Parquetry and Marquetry, inlay first appeared during the Italian Renaissance.

Gilding
Gilding is a technique wherein gold leaf is applied with plaster (plaster-like substance) to wood. It is highly decorative and was popular during the Italian Renaissance and the Louis period in France.

Antiques-Wood Basics

Tuesday, April 3, 2012

John Deere Engine Serial Numbers Explained

John Deere Engine Serial Numbers Explained


John Deere, like other engine manufacturers, uses its unique terminology and arrangeMents, to mark its products, and to assign part numbers. Understanding this marking and categorization system is crucial to part number identification, which is then used to select rebuild kits, components, parts and maintenance.

John Deere Engine Serial Numbers Explained

John Deere Engine Serial Numbers Explained

John Deere Engine Serial Numbers Explained


John Deere Engine Serial Numbers Explained



John Deere Engine Serial Numbers Explained

A typical engine serial number looks like TO4045T123456. To better understand this number, it will be split into several parts. The first segMent is the two initial letters "TO." These two initial letters indicates two things: one, which country it was manufactured in, and secondly, if it is or not-Powertech Powertech.

All John Deere engines manufactured in Dubuque, Iowa, USA, are preceded by the letters "TO all engines," preceded by "CD" are manufactured inSaran, a factory located in the Loiret region of France, and all engines manufactured in Torreon, Mexico, are preceded by the letters "PE".

The next set of numbers in the John Deere engine serial number are four (4) or (5) numbers and letters. In our example, this refers to "4045T." This can be further sub-divided into the "4045" and the "T". The 4045 indicated that this is model 4045. The initial "4" indicates that its build with four (4) cylinders. The "T" that's comes after the engine model number tells that the engine has a turbocharger attached onto it, and thus this is a turbocharged engine. This factor is significant as turbocharged engines are designed differently from non-turbocharged engines. Most importantly, parts may not be interchanged between these two kinds ofengines.

The last set of six (6) numbers is the sequential number of the engines as it comes off the assembly line. If this number is 123456, then the next serial number of the next engine on the same assembly line will be 123457. This will continue until John Deere decides its time to upgrade or to build another model.

There are many variations of the above serial number. The model 4045T can be marked 4045D. Here the "D" symbolizes that the engine is a diesel engine (some early John Deere's were manufactured to operate on gas), and that's it's naturally aspirated, i.e., it's not turbocharged. Thus, this serial number could have been TO4045D123456 and this would have been totally different from the TO4045T123456.

The serial numbers on 4045 can also be 3152,, 3179, 31643029, 4202, 4219, 4239, 4039, 4276, 6303, 6329, 6059, 6068, 6414, 6414, 4270, 6404, 6466, or 6076. They can be followed by a "D", "T" or a "H."

The issue of how to identify which engines are PowerTech and which are not non-PowerTech often arises. This can be solved by further dissecting the John Deere serial number.

For the engines made in Dubuque, Iowa, USA (Engines) all engines with a sequence number more than 700.000 are all Powertech engines.

For the engines made in Sarran, France, (engines) all engines with serial number sequence more than 500.000 are all Powertech engines.

John Deere Engine Serial Numbers Explained