Is eggshell bad for you?

Self-tutoring about cooking: the tutor revisits another question from his youth.

I was told, as a kid, to make sure no eggshell gets into food because eggshell is bad for you. Is it, really?

Apparently, eggshell isn’t bad for you, according to sources I’ve consulted. Eggshell in food is unattractive, yes, but not inherently poisonous.


Tech Insider, youtube

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Tomato leaf: I ate one

Self-tutoring about tomato leaf edibility: the tutor shares his first experiment.

Back in my October 11 post I mention research that suggests tomato leaves are edible, at least in small to moderate amounts.

Well, I ate a large tomato leaf yesterday straight from the garden. It was bitter, scratchy, and tingly on the tongue – I wondered if I’d made a mistake.

I never felt any ill effects, however.

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Psychology: what is gaslighting?

Self-tutoring about psychology: the tutor mentions gaslighting.

gaslighting (noun):

a type of emotional abuse designed to cause the victim to doubt their sanity. It is accomplished using lies, often in concert with bullying. Gaslighting is used to manipulate the victim by changing their point of view so they will acquiesce in situations they shouldn’t.

Gaslighting is said to be surprisingly common, and I agree. I hope to discuss scenarios surrounding it in future posts:)


Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

What does .za mean at the end of a domain name?

Self-tutoring about internet surfing: the tutor looks into the .za top level domain.

.za means the website is from South Africa, according to my source.


Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Breakfast showdown: nutella® vs cream cheese

Self-tutoring about breakfast foods: the tutor makes a comparison between cream cheese and nutella®

Bagel and cream cheese is a classic, of course. Yet, nutella® is definitely part of our culture now. What about a comparison between them? The cream cheese I’m using for reference is a common dairy brand.

  • nutella® is 5.3% protein, but the cream cheese is 6.7%.
  • nutella® is 31.6% fat, while the cream cheese is 33.3%.
  • nutella® is 57.9% sugar; the cream cheese is 0%.
  • Calories: per 15 gram serving, nutella® has 78.9; the cream cheese has 50.

No doubt, other varieties of cream cheese, with different fat content, are available. For the comparison, I’m using the one I always buy.

Interesting, eh?

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Are tomato leaves poisonous?

Self-tutoring about food: the tutor asks himself a question out of the blue, and finds a surprising answer.

As a kid, I was told tomato leaves are poisonous. Yet, are they?

I’ve found three sources, this morning, that mention tomato leaves being consumed. One tells of using them in tomato sauce, while another considers them a garden green. Perhaps, in small-to-moderate doses, tomato leaves might be safe to eat, for most people.

Apparently, tomato leaves do contain compounds that are toxic in large doses: eating a lot of them at once might lead to toxic overload.

I plan to experiment by eating a few tomato leaves from the garden. I’ll let you know what happens, if I don’t die:)


Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Weather: why does the temperature drop after sunrise?

Self-tutoring about weather: the tutor loves to bring you this post about a phenomenon that’s long confused him.

This morning, the temp was 6°C at 7am, but 4°C at 8am. The sun rose at 7:35am.

I’ve observed, so often, the temp dropping post sunrise. Yet, how can it make sense?

Finally, I read an explanation which is the best I’ve imagined. Mike Alger, a meteorologist in Reno, explains two key points:

  1. The thermometer’s position, typically, is several feet above ground. The temperature at ground level might be 5°C colder, since cold air falls.
  2. At sunrise, the ground starts to heat up, so the air touching it is stirred upwards. Reaching the thermometer, that colder air pulls the reading closer to the temp at ground. It takes the sun’s power to excite those cold air molecules so they bounce up to the thermometer’s level.

Mike observes that the drop in temp after sunrise is most likely on a clear, still morning. I agree. Here, we have dry nights that might turn out rather similar to conditions in Reno. His explanation is the best I can think of.

Thanks, Mike:)


Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Running treadmill vs outside

Self-tutoring about fitness: the tutor reflects about running on a treadmill vs outside.

I first tried running on a treadmill a couple of weeks back. I find it requires greater awareness than running outside, since specific position on the belt is very important.

Supposedly, to exert the same energy as running outdoors, the treadmill runner must go about 15% faster. The possible reason is that the treadmill returns more of the runner’s stride energy.


men’s health

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Botany: linden (basswood) tree

Self-tutoring about trees: the tutor mentions a linden he’s noticed.

In the northwest corner of a local sports field is a hardwood tree, perhaps 70 ft tall. Its trunk is oval; its max diameter might be 18 inches. The bark is gray.

The leaves are heart-shaped, around 5 inches long and wide. Round nutlike green fruits hang underneath, each bunch accompanied by a single oval leaf, completely unlike the tree’s typical leaves.

The tree, from my sources, is either an American basswood or a European linden. Based on leaf size, I suspect it’s the American basswood, which is also of the linden family.

Neither of those trees is native here.

When I was a kid, we had a new linden tree planted in our front yard on the base. I’ve always wondered when I’d encounter another:)


Brockman, Frank C. et al. Trees of North America. New York: Golden Press, 1968.

Little, Elbert L. and Susan Rayfield and Olivia Buehl. The Audobon Society Field Guide to North American Trees. New York: Alfred A. Knopf, 1986.

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.