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Author Topic: Down on the farm with the Bushlander  (Read 204510 times)

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Offline Dorsland

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Re: Re: Down on the farm with the Bushlander
« Reply #380 on: January 23, 2015, 03:16:45 pm »
The left scale is the minimum reading. The mercury pushes that little blue marker up into the red (minimum) calibration as the temperature drops. When the temperature rises again the blue marker stays behind, giving you a sort of manual "hold"  function. The button between the two scales is depressed to bring both the max and min readings to the current temperature.  

Hope that makes sense
Geleerdheid in die kop van 'n dwaas is soos 'n lemmetjie in die hand van 'n aap.

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Offline Dutchman81

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Re: Down on the farm with the Bushlander
« Reply #381 on: January 23, 2015, 03:29:39 pm »
Dit meet nou 38 grade by ons hier op Fort Beaufort
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Offline DeepBass9

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Re: Re: Down on the farm with the Bushlander
« Reply #382 on: January 23, 2015, 04:06:42 pm »
The left scale is the minimum reading. The mercury pushes that little blue marker up into the red (minimum) calibration as the temperature drops. When the temperature rises again the blue marker stays behind, giving you a sort of manual "hold"  function. The button between the two scales is depressed to bring both the max and min readings to the current temperature.  

Hope that makes sense

That's the bit I don't get. Max is easy, mercury expands, pushes up the marker, simple. But when the mercury contracts, why is the minimum marker pushed up?

Offline Dorsland

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Re: Down on the farm with the Bushlander
« Reply #383 on: January 24, 2015, 06:38:35 am »
Ha, you've had some time on your hands I see. ;D  But you got me thinking and Google is our friend:



From here: http://www.ask.com/science/maximum-minimum-thermometer-work-c4797c8a6f448d2e#

A maximum-minimum thermometer works by registering the maximum and minimum temperatures over a certain time period by using two scales set in liquid mercury. Two bulbs filled with alcohol or oil regulate the movement of the mercury.
Maximum-minimum thermometers are typically U-shaped parallel tubes of glass. One side registers the minimum temperature, while the other registers the maximum temperature since its last reading. The bend at the bottom of the thermometer contains the liquid mercury, which moves up and down based on contractions of the oil or alcohol located in the two bulbs at the top of the thermometer. The contractions of the alcohol or oil are the result of thermal changes in the environment causing it to expand or contract.
The oil or alcohol pushes the mercury in both tubes to record certain temperature readings, which are marked by steel indexes in the tubes that are held in place by small springs. The indexes are located on the surface of the mercury and move when the mercury is pushed by the oil or alcohol. When the temperatures reach their minimum and maximum, the steel indexes remain in place. This allows for the readings of both the minimum and maximum temperatures simultaneously without constant monitoring of the thermometer. The steel indexes can be returned to the surface of the mercury by using small magnets.


Now I also know, thanks for stimulating the "how the hell does that work?" juices  :thumleft:
« Last Edit: January 24, 2015, 06:39:03 am by Dorsland »
Geleerdheid in die kop van 'n dwaas is soos 'n lemmetjie in die hand van 'n aap.

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Offline XT JOE

Re: Down on the farm with the Bushlander
« Reply #384 on: January 25, 2015, 09:50:25 pm »
Hoe gaan dit daar met ons boer bokke
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Offline Dorsland

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Re: Re: Down on the farm with the Bushlander
« Reply #385 on: January 26, 2015, 06:15:53 am »
Hehe, dankie virrie inloer XT. Nee wat, dit gaan goed met hulle dankie. Hulle hanteer die hitte heel goed, darem beter as skaap. Ons dag temperature verlede week was tussen 38C en 41C gewees :-[

Die bokke sukkel nie. Ons kanse vir ren die week lyk ook goed so ek hou maar duim vas.
Geleerdheid in die kop van 'n dwaas is soos 'n lemmetjie in die hand van 'n aap.

CJ Langenhoven
 

Offline JMOL

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Re: Down on the farm with the Bushlander
« Reply #386 on: January 26, 2015, 06:36:12 am »
Die slim mense se dit gaan more by ons reen - so ek hoop vir julle boere dat dit wyd reen.
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Offline woody1

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Re: Down on the farm with the Bushlander
« Reply #387 on: January 26, 2015, 08:29:17 am »
Gisteraand aan jou gedink toe die weerlig my een rekenaar klits en dit reen dat die biesies bewe.
Hoop jy kry gou baie reen.

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Offline Boersoeknbike

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Re: Down on the farm with the Bushlander
« Reply #388 on: February 10, 2015, 08:02:20 am »
Dorsland, julle sulke goete by julle?

1 x boer + 1 x mamba in pad = baie seerplekke en ontnugtering : ek word oud
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Offline ChrisL - DUSTRIDERS

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Re: Down on the farm with the Bushlander
« Reply #389 on: February 10, 2015, 08:11:21 am »
Jinne maar daai "bullbar" is gebuig!! :eek7:
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Offline Dorsland

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Re: Down on the farm with the Bushlander
« Reply #390 on: February 10, 2015, 08:13:47 am »
 :o :o  Mamba s jy!  Nee kyk dan trek ek so vinnig daai brieke.  Maar ai man, dis jammer om daai ou Bushlandertjie so te sien  :-[  Jy moes hard neergewetter het om hom so te buig, hulle buig mos nie so maklik nie. Gaan jy hom regmaak?

Niks kiekies van Mnr Mamba nie?  ;D
Geleerdheid in die kop van 'n dwaas is soos 'n lemmetjie in die hand van 'n aap.

CJ Langenhoven
 

Offline Dorsland

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Re: Down on the farm with the Bushlander
« Reply #391 on: February 10, 2015, 08:14:12 am »
Jinne maar daai "bullbar" is gebuig!! :eek7:

Dis 'n Mamba Bar daai  ;D
Geleerdheid in die kop van 'n dwaas is soos 'n lemmetjie in die hand van 'n aap.

CJ Langenhoven
 

Offline Boersoeknbike

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Re: Down on the farm with the Bushlander
« Reply #392 on: February 11, 2015, 06:25:20 am »
Neewat, toe ek eers opkom was dit te seer om fotos te neem... fiets amper bo-op hom, en hy seil rustig verder...
Oor algemeen neem ek fotos NA die 12br gepraat het, nie voor die tyd  :o
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Offline Dorsland

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Re: Down on the farm with the Bushlander
« Reply #393 on: April 06, 2015, 10:46:54 am »
Hier is die jongste foto van ou Bly, spesenjaal vir Mev Vis.

Julle sal onthou hoe ek haar in die veld gevind het nadat sy agter gebly het die oggend na sy gebore is, en vandag lyk sy so:
Geleerdheid in die kop van 'n dwaas is soos 'n lemmetjie in die hand van 'n aap.

CJ Langenhoven
 

Offline Dorsland

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Re: Down on the farm with the Bushlander
« Reply #394 on: April 06, 2015, 10:49:32 am »
En toe gister moes ek eers die wonderlike gesig van riviere wat weer na 4 maande se stofdroog en bitter warm dae, loop, gaan kyk en bietjie speel.  Man, ek trek sommer my skoene uit en gaan speel soos 'n kind in die water en op die rotse.
« Last Edit: April 06, 2015, 12:03:11 pm by Dorsland »
Geleerdheid in die kop van 'n dwaas is soos 'n lemmetjie in die hand van 'n aap.

CJ Langenhoven
 

Offline Dorsland

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Re: Down on the farm with the Bushlander
« Reply #395 on: April 06, 2015, 10:53:59 am »
Alles is pragtig groen, die plante blom en die veld groei en alles kry weer lewe hier na die ren.  Vanoggend is dit die pragtigste wolkbank wat hier oor die Sneeuberge hang.  Die winter is oppad, gister was maar 12C.  Nou kan hy maar kom, dit het geren en die bossieveld loop bitter mooi uit.  As die koue nog net so 'n stuk kan wegbly sal ek dalk nog 'n laaste lusernsnysel ook afhaal.  Sommer so op die Paasnaweek.  Die Here se genade is inderdaad bitter groot.
« Last Edit: April 06, 2015, 12:04:36 pm by Dorsland »
Geleerdheid in die kop van 'n dwaas is soos 'n lemmetjie in die hand van 'n aap.

CJ Langenhoven
 

Offline Bikerboer1973

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Re: Down on the farm with the Bushlander
« Reply #396 on: April 06, 2015, 11:53:20 am »
Pragtige fotos!

Daai sampioene of "Kowas" soos ek dit ken is fantasties lekker gebraai met n bietjie botter. Het groot geword met dit saam lekker poetoepap, hmm hoe honger word ek nou!
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Offline Dorsland

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Re: Down on the farm with the Bushlander
« Reply #397 on: April 06, 2015, 11:56:05 am »
Dankie BB  :thumleft:  Ek is maar ligtig om sommer so sampioene uit die veld te eet, maar lyk my jy het darem op daai dieet grootgeraak  ;D
« Last Edit: April 06, 2015, 11:57:05 am by Dorsland »
Geleerdheid in die kop van 'n dwaas is soos 'n lemmetjie in die hand van 'n aap.

CJ Langenhoven
 

Offline Dutchman81

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Re: Re: Down on the farm with the Bushlander
« Reply #398 on: April 06, 2015, 11:56:07 am »
Mense maar ek is bly vir oom hulle , nou kan oom hulle weer vir n slag asem haal , dankie vir die mooi fotos

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Offline Dorsland

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Re: Re: Down on the farm with the Bushlander
« Reply #399 on: April 06, 2015, 12:01:54 pm »
Mense maar ek is bly vir oom hulle , nou kan oom hulle weer vir n slag asem haal , dankie vir die mooi fotos

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Waaragtig Dutchman,  ek slaap sommer weer lekker in die nagte.  Tot die leivoor kabbel weer hier voor die huis verby.
Geleerdheid in die kop van 'n dwaas is soos 'n lemmetjie in die hand van 'n aap.

CJ Langenhoven