Thanks Surajit Donga ..boat... just saw one in a canal off off the Rupanarayan river over the weekend... no pic though... a dug out from a narkel gaachh perhaps..
and classes of levers,,, reminded me of 5th grade physics classes... way back when!!! usha di On Sun, Jan 27, 2013 at 7:06 PM, surajit koley < [email protected]> wrote: > Good evening Gurcharan Sir, Usha Di, Pankaj Ji > > As Usha Di said, it is a simple means of irrigation without any carbon > footprint, specially employed in those older days when there was no pump, > deep or shallow submersibles. > > But, there is another DONGA, > DONGA-BOAT<http://www.flickr.com/photos/66904750@N04/6302382337/>, > to carry a person or two in water logged area or lowland or marsh. > > DONGA works as a class-I > lever<http://en.wikipedia.org/wiki/Lever#Classes_of_levers>, > rather i would say, it is a combination of two levers. The one is the > bamboo frame which works as a seesaw, one end is tied (with a piece of rope > or another small piece of slim bamboo stick) to the far end of the > elongated boat like structure made out of galvanized metal sheet (iron or > tin or an alloy). The other end of the long bamboo culm is either attached > with a heavy weight (wet sand bag, not seen in the photo) to act as an " > effort <http://en.wikipedia.org/wiki/File:Lever_(PSF).png>", or a person > (in this case we need two persons to operate this simple machine) to exert > "effort" on this end. > > The second lever is the elongated boat like metal container where the > ground itself acts as fulcrum. The close end of this "boat" is immersed > into the water and then it is raised to make water flow down the channel > shown in the fourth photo. To give firm support to this metal boat cross > iron rods are soldered along its length (thereby, the ladder like > appearance). > > Long live the DONGA of West Bengal !!! > > Regards, > > surajit > > > > On Sun, Jan 27, 2013 at 4:50 PM, Ushadi Micromini < > [email protected]> wrote: > >> Pankaj >> anytime I can give you some faltu information call on me >> ha ha... >> >> wont help your dissertation or papers for Orchids >> but will broaden the horizons !!!! >> >> :)) >> >> Usha di >> >> On Sun, Jan 27, 2013 at 4:46 PM, Pankaj Kumar <[email protected]>wrote: >> >>> Ok yes, it might be meant for collecting water then pulling up with >>> the help of bamboos to move water on the field. >>> Thanks for enlightenment :) >>> Pankaj >>> >>> >>> On Sun, Jan 27, 2013 at 7:13 PM, Ushadi Micromini >>> <[email protected]> wrote: >>> > I dont think its for crossing the canal or the puddle, >>> > >>> > its for irrigation, the other/fard end should also be in water, the >>> bamboo >>> > end on the top gets pulled down by humans or animals that walk away >>> from >>> > that pole, and the metallic ???ladder?/ pulls water up and dumps it in >>> the >>> > ditch near the veggies growing in the filed.... >>> > >>> > Its not a foot bridge, I dont think >>> > unless Surajit says otherwise.. >>> > >>> > >>> > So tell us what is it? Surajit.. >>> > Usha di >>> > >>> > On Sun, Jan 27, 2013 at 4:35 PM, Dr Pankaj Kumar < >>> [email protected]> >>> > wrote: >>> >> >>> >> Thats cute. I imagine thats a metallic thing, but why it is open on >>> the >>> >> other end. >>> >> I had similar experience and to add to it, I can't swim. >>> >> One of the most risky but funniest experience was when me and Dr. Jana >>> >> Sckornikova crossed a flooded river on foot with our bags raised high >>> above >>> >> our head as we had our photographic equipment. Obviously we were >>> totally >>> >> drenched. But it was memorable. She only said, "YOU ORCHID GUY MADE >>> THIS >>> >> GINGER GIRL WET".....On that day we found some interesting orchids and >>> >> ofcourse 3 Curcumas for Jana. >>> >> She is one of the toughest taxonomist I have ever known. We even >>> slept on >>> >> railway platform in Bilaspur during one of our summer trips to >>> Achanakumar >>> >> Tiger reserve. We found the true Curcuma angustifolia, and >>> unfortunately, >>> >> only one orchid during that trip in Chattishgarh !!! >>> >> >>> >> >>> >> >>> >> >>> >> On Sunday, 27 January 2013 02:12:29 UTC+8, surajitkoley wrote: >>> >>> >>> >>> Sir, >>> >>> >>> >>> After a long time i see this and i cannot help but share it with you. >>> >>> >>> >>> Thank you, >>> >>> >>> >>> Regards, >>> >>> >>> >>> surajit >>> >>> >>> >> -- >>> >> >>> >> >>> >> >>> > >>> > >>> > >>> > >>> > -- >>> > Usha di >>> > =========== >>> >>> >>> >>> -- >>> ********************************************************************** >>> "Taxonomists getting Extinct and Species Data Deficient !!" >>> >>> Pankaj Kumar, Ph.D. >>> Conservation Officer >>> >>> Office: >>> Orchid Conservation Section >>> Flora Conservation Department >>> Kadoorie Farm and Botanic Garden (KFBG) Corporation >>> Lam Kam Road, Tai Po, New Territories, Hong Kong. >>> >>> Residence: >>> 151, 1st Floor, Tai Om Tsuen >>> Tai Po, New Territories, Hong Kong. >>> >>> email: [email protected]; [email protected]; >>> [email protected] >>> Phone: +852 2483 7128 (office - 8:30am to 5:00pm); +852 9436 6251 >>> (mobile). Fax: +852 2483 7194 >>> >> >> >> >> -- >> Usha di >> =========== >> >> -- >> >> >> >> > > -- > > > > -- Usha di =========== --
