Australia's Science Forum

I have to agree with Lyn .
Although I have fixed many a test tube , beaker and measuring cylinder that is chipped, its justvnot really worth the bother . They are so cheap in bulk ... especially test tubes .

But Labbie is on the money . More heat will help melt the glass and dull the edge .

Hey Ian ....Sounds like your Mobs right on track with ours ......what Labbie said ....been wrapping and bagging this week too .
Not so sure about keeping it if its still green ....but hey , its about all it gets used for so why not

Our casuals and non-science staff are allowed to do pracs that don't involve chemicals at the HT's discretion based on the class and the teacher . There have been a rare few occasions where they have been permitted to use relatively safe chemicals ( salt , calcium carbonate etc ) but anything to do ...

Droppers won't do it .....its just not strong enough .

I give them a small stock solution of Iodine that is 10x strength ( I dilute it down for droppers )

They just carefully add it to the water in the beaker , gas jar what ever , until it is a pale brown colour . ....works everytime

Yeah remember having issues with that but can't remember the acid strength off hand .
I do remember Quickeze tablets worked and Mylanta did not

Only thing I can see is that diaphragm pumps are more chemical resistant than the rocker which I think is the piston type . I guess it depends what you will use it on and the likelihood of corrosive vapours etc getting sucked into it . If it was just for bell jars and perhaps sucking some chalk thro...

RE: Silicone rubber teats Anyway. come in today and went to top up the 1M sodium hydroxide ones for a prac and discovered that several of them have started to "become one " with the dropper bottle requiring peeling off .................. It's possible that the kids just screwed the lids on...

I floated the idea of the plastic ones and was told no way , our mob would squirt each other with them .....maybe ....maybe not ....I'll never find out .

Thanks Kate , PM sent

Hi Annette LOL I've just been asked to sort this one too .( not Pearsons but the same thing) After a bit of mucking about yesterday I found that if you use wire , it requires a lot of current , in excess of what our typical power supplies can supply before tripping out to get a visible deflection .....

We don't have a cabinet for corrosives at all, they have their own bank of shelves in the chemstore. I haven't had any problems with my iodine (or anything else) staining labels. Same here melsid . We did have Iodine in a small cupboard in the prep room and there was a brown stain on the wall behin...

Stick with the IEC . The clones are cheap for a reason . Just a little example . I was presented with one that had no pins inside the Power socket ...I looked at the lead .....apparently kid pulled 3 pin lead out of back , socket was so cheap , the pins had fused inside plug and he presents teacher ...

Hey thanks for all your suggestions . OK , will forget about Access . ....till tossing up between Excel and Sheets . In both I've found you can put a hyperlink to a picture file which means its attached to the row but if I use Excel on the Staff drive and someone moves the picture folder into anothe...

Thanks Prima . Yeah , that was where I was thinking . Do you know if there is a way to insert a picture into a cell in excel or google sheets ? You can insert a pic but it "sits" on the spread sheet and isn't "locked" to anything ..... I am only an excel beginner....and probably ...

Hi all . I'm just about to embark on a total re-arrangement of the Storeroom and Pre-room and want to make a database which records where everything is . This will be a printed copy but also want an electronic version so that staff or more importantly , relieving Labby can quickly find stuff . So op...

Surprised you guys have had bad experiences with Silform . Fishy , perhaps the issue with your leaking Sulfuric acid was the fault of the courier . We have a great deal of Silform Chemicals and have not noticed any issues with poor quality . Interestingly Silform did offer a special last year and on...

Silform ...they are cheaper than most .

If its not a dangerous goods item then I will add it to any order to Seratta or Science supply Australia etc.

Hope you all had a great break .
I had an amazing time down with our kids which have all moved back to Melbourne . Survived wild storms just before Xmas but still haven't cleaned up all the mess.
Good to be back at work .

AnnNos wrote: ↑19 Dec 2018, 07:50 It might be a Ruben's tube.

Physics teacher was hoping it was Ann but we decided it wasn't for that purpose
But gee those things a pretty cool .

Labbie wrote: ↑18 Dec 2018, 12:55 wow found any money ha ha

It's all Priceless Labbie
I love finding all these old relics and trying to figure out what they were used for . Always hoping that someone might be looking and remember .