
Lately I have been noticing a lot of connections between things. I think about one thing and while researching it I run across other interesting things and these things often connect back to something else I had been thinking about.
Well, a couple of posts back (Silent Skies) I was hanging around a wood pile watching the evening deepen and I commented about the unique scent of the fresh cut logs:
“To me locust wood has an earthy, mossy, slightly sweet, and almost but not quite musty scent. It reminds me of the wonderful sweet perfume of the flowers that cover the tree in white raiment each spring only it is muted and mixed with the dark richness of the soil that feeds the tree’s inner life.”
At this same time I happened to be reading “The Essential Writings of Ralph Waldo Emerson”. I got down toward the end of the book and there is a reprint of Emerson’s memorial address on the death of Henry Thoreau. He makes this comment about Thoreau:
“He thought the scent a more oracular inquisition than the sight – more oracular and trustworthy. The scent, of course, reveals what is concealed from the other senses. By it he detected earthiness.”
Interesting. I was just thinking about the scent of wood and the earthiness that could be detected in it. So I thought I would look into just what makes earth (dirt, soil, mould) smell like it does.
We have all smelled it even though we might not know what causes it. The smell you get driving past a freshly plowed field, or the smell of the soil when you dig a hole to plant a tree or a rose bush in the garden, or the scent on the air after a summer downpour (smells like worms).
That scent is caused by a chemical called geosmin and it is produced by bacteria in the soil called actinomycetes. No one is quite sure why the bacteria produce this compound or why humans find it to be pleasant. However, I did run into this interesting tidbit – this type of “friendly” bacteria can act as an antidepressant leading the researchers to wonder whether we should spend more time playing in the dirt.
This lead me to an article about how bacteria in the soil alter the makeup of certain fragrance oils. The investigators found that they could alter the fragrance by controlling the bacteria and what they are fed and reached this conclusion:
“This finding may go some way to explain why the properties of the Vetiver oil change significantly depending on the environment in which it was grown.”

At this same time I was also trying to come up with a title for an upcoming show of my photos. I want something that isn’t too strictly defining yet points toward the idea that nature can and should be appreciated wherever it is found and not just when it is located in far off national or global scenic hot spots. Something along the lines of the recently coined word ”locavore” that describes someone that prefers locally grown foods to those shipped in from thousands of miles away.
This path lead me through tangled vines of related words like autochthonous, indigenous, propinquity and foreign words like the latin proximum, the japanese ma, and finally to the french word terroir. Terroir brought me back to the soil.
Terroir seems to translate to something like “a sense of place” or “a taste of the soil” or as one author put it; somewhere-ness. It is a quality imparted to a crop, wine in particular, by the locale in which it is grown. So some might say that part of what makes a great french wine great is that it comes from grapes grown in France, on a particular vineyard in France, and maybe even on a particular section of a particular vineyard in France.
Terroir is a complex and controversial concept in the wine world. I find wine making fascinating, but my taste buds are much too crude to appreciate the subtleties involved. I can’t argue the pros and cons. I just liked the idea that places have a taste.

In Silent Skies I also wrote:
“Each species of tree has its own unique scent just as each one has a unique grain pattern, color, and texture. I’ve heard that veteran woodworkers can identify species of wood by smell alone just the way oenophiles can identify vintages. If you think about it, wooden barrels figure prominently in the making of many wines and the type of wood used is critical to imparting just the right flavors and aromas.”
This was before I learned about terroir. Maybe the scent of the wood, like the taste of a wine, not only depends on the species of tree, but also on the plot that reared it. Maybe locust wood from near my home has a slightly different scent than wood from say Pennsylvania - I’ll bet that it does.
MDW
P.S. Another tidbit I found was that geosmin is often implicated (along with other compounds) in “cork taint” a taste that destroys otherwise good wine.
P.P.S. Another quote from Thoreau where he seems to confuse his senses:
“I put on some hemlock-boughs, and the rich salt crackling of their leaves was like mustard to the ear, the crackling of uncountable regiments. Dead trees love the fire.”





